Jurnal Teknik Industri Terintegrasi (JUTIN)

Analisis beban kerja mental operator produksi aksesoris motor menggunakan metode National Aeronautics And Space Administartion Task Load Index (NASA TLX) di CV. Anugerah Teknik

2024-10-22T20:57:49+00:00

CV Anugerah Teknik is a company engaged in motorcycle components and accessories. Product development and certification can affect the workload of production operators. Therefore, it is necessary to analyze the mental workload of production operators. Data was collected through interviews and distributing questionnaires to production operators. This research uses the NASA-TLX method. The results of the analysis show that the average value of mental workload of production operators is 72.13, which falls into the high category. To reduce the workload, it is recommended to increase the number of operators in the production division, which can lower the score to 49.18.

Pembuatan papan blockboard menggunakan limbah batang kelapa sawit sebagai upaya pelestarian lingkungan

2024-11-03T02:29:31+00:00

This study was conducted to make blockboard using oil palm trunk waste as raw material. The purpose of this study was to determine the physical and mechanical properties of blockboard made from oil palm trunk raw materials and compared with the physical and mechanical properties of blockboard available on the market. The mechanical properties tested were tensile strength, flexural strength and air absorption. The oil palm trunk used was waste from rejuvenation that was 25-30 years old. The results showed that blockboard made from oil palm trunk waste had higher tensile strength and flexural strength values ??than market blockboard. Meanwhile, the water absorption capacity of market blockboard is better than the water absorption capacity of blockboard made from oil palm trunk waste. This study was conducted to implement one of the government policies in the context of utilizing oil palm waste, especially oil palm trunk waste as an effort to preserve the environment.

Pengaruh durasi pembakaran dan persentase abu sekam padi terhadap kuat tekan mortar

2024-11-02T03:14:08+00:00

Cement is one of the main materials in mortar that has a negative impact due to its manufacture. Various new studies and innovations continue to be carried out to increase the utility value of waste and reduce the negative impacts of cement manufacture. One of the innovations is the use of rice husk ash as a substitute for cement in making mortar. It is known that rice husk ash has a high silica content where the content is the same as the content of cement. The duration of good burning of rice husk ash is 6 hours with normal burning. The percentage of rice husk ash used in the study was 0%, 5%, 10%, and 15% of the weight of cement. The test results showed that 10% rice husk ash with a burning duration of 6 hours used as a mortar mixture had the highest compressive strength value of 32.04 MPa.

A Analisis Produktivitas Menggunakan Objective Matrix (OMAX) pada lantai produksi Sigaret Kretek Mesin (SKM) PT. Nikorama Citra Tobacco

2024-11-02T03:05:19+00:00

This study is centered on calculating the productivity of the SKM (rolled kretek cigarette) production floor work station of PT. Nikorama Citra Tobacco from 22 January 2024 to 29 February 2024 which aims to measure the level of productivity in the cigarette production process on the SKM production floor, identify key elements that have the greatest impact on the level of productivity achieved, and propose or recommend improvement steps to increase productivity in the production process on the SKM production floor. This research utilizes the objective matrix method (OMAX) by measuring two elements of productivity, namely the element of efficiency and the element of effectiveness. From these two elements of productivity, six measurement ratios are obtained, labor ratio, production output ratio, working hours ratio, defective product ratio, production time ratio. , engine ratio. The results of this research show that the productivity results of the SKM production floor fluctuate up and down due to the instability of the productivity ratio performance value where the highest productivity occurs on February 22 2024 and the worst productivity on January 22 2024, while the best ratio value occurs in the yield ratio. production and worst ratio values ??on machine ratios. The worst ratio value occurs in the machine ratio so improvements need to be made so that the productivity value can be more optimal.

Penerapan metode rating scale dengan pendekatan Analytical Hierarchy Process (AHP) pada penilaian kinerja karyawan PT. Omega Mas

2024-10-31T18:28:14+00:00

This study evaluates the employee performance of PT. Omega Mas using the AHP method and rating scale. Conducted from December 2023 to February 2024, it involved 133 employees from 14 departments. The criteria included maturity, work attitude, teamwork, discipline, and work results. The results showed that "work results" had the highest weight (0.51), with "quantitative work" as the primary sub-criterion. From the performance assessment, 6 employees were categorized as "very good," 47 as "good," and 80 as "sufficient." The conclusion is that this evaluation helps the company improve its human resources quality and competitiveness in the market.

Analisis peramalan kebutuhan Alumunium Sulfat (Al2SO4)3 untuk meningkatkan kualitas produksi menggunakan metode Single Moving Average

2024-10-31T02:00:09+00:00

The quality of a product produced is a top priority for the company. The need for the use of chemicals for product quality in the company must also be taken into account so that it can be used efficiently, therefore in planning raw material requirements, a forecasting analysis of the needs of these secondary raw materials can be carried out. Based on the planning of the need for the use of these chemicals, the author conducted a study discussing the Forecasting of Aluminum Sulfate Al₂(SO₄)₃ Needs in the company to improve production quality using the single moving average method. The study used qualitative and quantitative research methods, the study was aimed at seeing the application of the use of forecasting methods in companies and as a reference for learning the application of these methods for students. The author uses historical data on the use of Alum or Aluminum Sulfate in 2022 to May 2023 at one of the water treatment installations as a water purifier, with a movement value of n = 5,6,7,8,9. The results of the forecasting calculation obtained the lowest error rate in MSE and MAPE, namely at movement 5.

Komunikasi partisipatif masyarakat Suku Akit kepada pemerintah dalam pengelolaan hutan mangrove di Kecamatan Bantan Kabupaten Bengkalis

2024-10-31T01:58:46+00:00

This study examines the participatory communication between the village government and the Akit Tribe community in managing mangrove forests in Bantan District, Bengkalis Regency. The research focuses on the role of dialogue, voice empowerment, and emancipatory education in encouraging community participation. Prior research emphasizes that active community involvement in natural resource management is crucial for environmental sustainability. This study aims to analyze how dialogue, voice empowerment, and emancipatory education are applied by the Akit Tribe in managing mangrove forests. A qualitative approach with a case study design was used, collecting data through observation and in-depth interviews. The findings show that the dialogue process has been effective, though communication barriers persist. The indigenous community also utilizes media for information sharing and community activities, while emancipatory education plays a key role in empowering the Akit Tribe in managing mangrove forests.

ANALISIS PENGENDALIAN KUALITAS PRODUK BARREL MENGGUNAKAN METODE KAIZEN DAN PDCA FRAMEWORK DI PT. XYZ

2024-10-28T07:16:36+00:00

PT. XYZ is a medical device manufacturing company that produces components for syringes, one of which is the Barrel product. The Barrel product has high demand, so effective quality control is essential to reduce the defect rate. This study aims to analyze ways to reduce defects in the Barrel product using the Kaizen and Plan-Do-Check-Action (PDCA) methods. In the planning phase (Plan), the dominant types of defects were identified using a Pareto diagram, which revealed three main defect types, with shortmold as the primary focus. The causes of this defect were analyzed using a Fishbone diagram. In the Do phase, corrective actions were implemented by setting objectives and goals for improvement, as well as identifying defective products with the help of the 5W+1H tool. The Check phase involved further inspection using a Check Sheet to analyze data showing a reduction in defects between October 2023 and January 2024. In the Action phase, quality control was implemented by monitoring employee performance and product quality, as well as evaluating the results of the improvements. The results of the study indicate a significant reduction in the number of defective products following the implementation of corrective actions.

Kajian kepuasan penumpang pengguna face recognition pada sistem boarding pass di Stasiun Madiun

2024-10-28T07:05:02+00:00

This study aims to evaluate passenger satisfaction with the use of Face Recognition technology in the boarding pass system at Madiun Station. This technology was adopted to improve the efficiency of the boarding process and reduce queues, but it still creates different perceptions among users regarding its convenience. The study used the SERVQUAL method to measure service quality with five main dimensions: Tangibles, Reliability, Responsiveness, Assurance, and Empathy. Data was collected through questionnaires to 100 respondents, long-distance train users who boarded from Madiun Station. The results showed a gap between user expectations and system performance, especially in the Tangibles and Reliability dimensions. This study recommends improvements in the operation of Face Recognition technology and increased socialization to passengers to better understand and accept this system.

Perencanaan perkerasan jalan raya pada perlintasan sebidang di JPL 136 Kota Madiun

2024-11-07T08:50:55+00:00

The construction of road pavements at level crossings typically employs flexible asphalt pavements, which are prone to peeling and damage. It has been stated that the pavement structure at at-grade crossings between roads and railway tracks should differ from the pavement structure in sections approaching the crossing. The pavement structure at at-grade crossings is recommended to have greater strength than the pavement structure on existing road sections, such as the use of rigid concrete pavements (Prasarana, 2004). In this research, the road pavement at the JPL 136 at-grade crossing in Madiun City is planned to use rigid cement concrete pavement, with the construction calculation using the cement concrete pavement planning method (Ministry of Public Works and Housing, 2003). After analysis, a rigid cement concrete pavement construction with a thickness of 150 mm, a compressive strength of 35 MPa, longitudinal reinforcement D16-170, and transverse reinforcement D12-100 with BJTS 420 A type was obtained.

Implementasi metode Design For Six sigma (DFSS) pada kemasan Bumbu Oil Mie Goreng (BOMG) di PT. XZY

2024-10-22T21:02:23+00:00

PT XZY is a company in the industrial sector that produces instant noodles. In the production process, PT XZY faces several problems that cause product defects, especially in the packaging of Bumbu Oil Mie Goreng (BOMG). This packaging has several deficiencies such as quality defects (squashed packaging, folded edges, contents not up to standard) and unstable productivity. Therefore, this study aims to identify the factors that affect product defects and conduct development to improve quality and productivity. This research uses the Design for Six Sigma (DFSS) method with the stages of Define, Measure, Analyze, Design (DMAD). Based on the results of research using the design from six sigma method, it states that the highest sigma value of defects occurs with a total sigma value of 2,910 and also produces the highest value of defects in the noodle packaging squash factor of 38% resulting from the Pareto diagram.

Evaluasi penerapan standardisasi SNI 8371:2018 dan SNI 8372:2018 pada UMKM Deean Cakes and Bakery

2024-10-28T10:53:20+00:00

MSMEs need implementation of standardization to ensure quality and customer confidence in they products. The implementation of SNI 8371:2018 for Sweet Bread and SNI 8372:2018 for Fresh Bread at Deean Cakes And Bakery MSMEs aims to ensure that every product they produce meets the food safety, health and quality standards set by the government. The Gap Analysis method at is carried out with the aim of identifying things that are still not in accordance with SNI standards, which will later become the basis for preparing quality system documents. The results are several things that still need to be brought in line with SNI standards, such as the absence of a special room for storing goods, the ceiling is still made of plywood which is easily damaged, and some production documentation. MSMEs is implementing a food safety quality management system based on the HACCP (Hazards and Critical Control Points) system.

Analisa kualitas pelayanan menggunakan metode Service Quality (Servqual) dalam meningkatkan kepuasan nasabah (Study kasus: Bank Mandiri)

2024-10-22T20:48:28+00:00

PT Bank Mandiri is a company engaged in banking, insurance, and e-commerce. This study employs factor analysis to process the data, where this technique is used to group measurement indicators in the service quality measurement tool (Servqual) based on the proximity of each tested indicator. This study uses SERVQUAL, which consists of five dimensions to measure customer satisfaction with service companies, namely: Reliability, Responsiveness, Assurance, Empathy, and Tangibles. The calculation of thegapvalue per dimension shows that the Responsiveness dimension has the highestgapvalue of 0.56, indicating that this dimension has met respondents' expectations. The overallgapcalculation shows that the overallgapvalue is 1.74, which means that the quality of service provided by PT Bank Mandiri Cabang Bekasi Juanda fully meets the needs and desires of the respondents. Based on the results of the research conducted to measure the service quality at PT Bank Mandiri Cabang Bekasi Juanda, it can be concluded that the calculation results using the Service Quality method show that the average actual value of customers is 71.32 and the average expected value of customers is 69.58, resulting in a positivegapvalue of 1.74, which indicates that customers are satisfied with the services provided by PT Bank Mandiri Cabang Bekasi Juanda

Analisis Keselamatan dan Kesehatan Kerja (K3) dengan menggunakan metode HAZOPS pada pekerjaaan duckting di PT. Surya Marga Luhur

2024-10-22T20:39:33+00:00

PT Surya Marga Luhur, providing services in mechanical and Electrical works, produces various services such as Mechanical Works, Electrical works, and HVAC Maintenance to find out what types of work accidents most often occur in mechanical works services. HAZOP is to systematically review a process or operation on a system to determine whether process deviations can lead to unwanted events or accidents. The number of work accidents during 2023 occurred 7 impacts of work accidents. The seven impacts of accidents are eye splashes, stab wounds, lacerations, fractures, bone fractures, lacerations and fractures, and bruises to the legs. The most frequent defects are lacerations and fractures with a risk assessment of 12 which is an extreme risk level. To reduce these accidents, there is discipline for the use of PPE, following the SOPs set by the K3 team and the HSE team.

Reflecting internalization and manifestation of Sundanese cultural values on leadership communication styles in the mining industry (an ethnographic study at PT Petrosea, Tbk.)

2024-10-20T08:36:04+00:00

This research explores the influence of Sundanese cultural values on leadership communication styles at PT Petrosea, a mining company in Indonesia. This qualitative research employs an ethnographic approach and involves three leaders at PT Petrosea who have a strong Sundanese cultural background. Data were collected through participant observation and in-depth interviews, and then analyzed qualitatively. The results show that Sundanese cultural values, such as "someah hade ka semah" (being friendly and kind to everyone), "silih asih, silih asah, silih asuh" (loving each other, educating each other, and caring for each other), and "hade tahta hade bahasa" (harmony between position and speech), are internalized and manifested in their leadership styles. These values are reflected in communication styles that are "rame" (vivacious, lively, together) and "hegar" (warm, cheerful, positive), emphasizing harmony and teamwork, as well as the ability to adapt to various situations. This research recommends integrating local cultural values into the development of contextual and sustainable leadership models.

Analysis of disruption factors at PT PLN Indonesia Power PLTU Banten 2 Labuan PGU using a grounded theory approach and pareto analysis of lean kaizen

2024-10-20T15:10:44+00:00

The reliable and efficient availability of electricity is a crucial factor in economic and social development. PT PLN (Persero), through its subsidiary PT PLN Indonesia Power, is responsible for providing electricity, including operating the 2x300 MW Banten 2 Labuan coal-fired power plant. However, in 2022, the Banten 2 Labuan plant experienced 28 disruptions, leading to a decrease in production capacity from 4,838.4 GWH to 4,259.716 GWH per year. This study aimed to identify the factors causing these disruptions and the decline in electricity production capacity. A qualitative approach using the Grounded Theory method was employed, involving in-depth interviews with the Assistant Manager of Operation Planning and Control, the Assistant Manager of Maintenance Planning and Control, and the Assistant Manager of Public Relations and CSR of the Banten 2 Labuan plant, as well as field observations and document studies. Through open coding, axial coding, and selective coding, three themes emerged as causes of disruption: internal factors (frequency 14), external factors (frequency 9), and force majeure (frequency 4). Pareto analysis revealed internal factors as the most dominant, contributing to 51.9% of the disruptions, with equipment failure (frequency 11) being the most significant internal factor, contributing 40.7% to the total disruptions. Consequently, optimization of maintenance strategies, improvement of human resource competencies, and the application of Lean Manufacturing principles, including Predictive Maintenance, Preventive Maintenance, Corrective Maintenance, and Breakdown Maintenance within the framework of Reliability Engineering and Maintenance Management, are necessary to enhance the operational reliability of the Banten 2 Labuan power plant.

Analisis penerapan UI/UX dalam aplikasi media sosial: Dampaknya terhadap keterlibatan pengguna dan loyalitas platform

2024-10-21T09:39:55+00:00

This research focuses on applying UI/UX design principles in social media applications and analyzing their impact on user engagement and platform loyalty in the long term. With increasing competition among social media platforms, user experience has become a major determining factor in app success. This research explores how UI/UX elements such as efficient navigation structure, consistent visual aesthetics, interface responsiveness, and content personalization play a role in increasing user engagement, time spent on the app, and user intent to return to the platform. Using quantitative and qualitative approaches, data was collected through user surveys and analysis of behavioral data from several leading social media platforms. The research results show that optimal UI/UX design not only significantly influences user engagement levels, but also increases user loyalty, reduces churn rates, and increases retention in the long term. This study provides strategic recommendations for social media application developers in designing interfaces that support sustained engagement and positive user experiences

Rancangan gelang pintar untuk siswa tunarungu menggunakan metode Quality Function Deployment

2024-11-19T07:26:13+00:00

Improving the quality of life for deaf students with special needs, the development of assistive technology is crucial to aid in the classroom learning process. This research aims to design an assistive technology in the form of a Smartband that is beneficial for helping deaf students to interact, understand instructions, and engage in social interactions. The design of this smartband employs the Quality Function Deployment method to ensure that the needs and desires of deaf students are met in the designed device. Based on the analysis of questionnaires from 43 deaf students, eight Customer Requirements were identified. The top priorities for development were voice call detection (14.2%), surrounding hazard alerts (13.99%), and notification capabilities (13.49%). By utilizing the Relationship Matrix in the House of Quality, the Technical Priorities to be developed were determined, namely a voice recognition sensor (19% with a technical importance score of 135), followed by ESP32 and Vibration Motor (16% with a technical importance score of 117). The designed smart bracelet functions well but requires further evaluation, especially in terms of aesthetics, as the current respondents were limited and did not differentiate based on age, which is known to have varying preferences.

Perbandingan analisis studi kelayakan usaha hasil peramalan simulasi monte carlo dengan kondisi sebenarnya

2024-12-12T09:35:23+00:00

Every laundry business owner certainly wants to know how far the business they have run has developed. To find out this, a business feasibility study is needed that looks at the aspects of revenue and total costs. However, unfortunately, business actors do not carry out business feasibility study calculations. Therefore, this research aims to analyze the extent of business development in the coming period. The approach used is Monte Carlo simulation to calculate the amount of revenue in the future period and the R/C ratio is calculated and the actual condition results are also calculated by the R/C ratio to obtain comparative results. Based on the R/C ratio results with simulation revenue results, it shows that the laundry business in February and April was above 1, which means it experienced a profit and vice versa, with actual conditions in February and March below 1, which means it experienced a loss.

Usaha meminimalkan cacat produk untuk merencanakan persediaan bahan baku yang optimal (Studi kasus: UD XYZ)

2024-12-05T21:23:28+00:00

This study uses quantitative methods and aims to provide inventory control proposals using forecasting analysis and continuous review systems and to find out the root cause of the gallon cap product defects at UD XYZ. The results obtained are obtaining the procurement cost of Aqua HDPE Plastic, which has savings of Rp9,187,465.00. For the procurement cost of Dark Blue HDPE Plastic, there is a savings of Rp6,770,828.50. For the procurement cost of Dark Blue HDPE Plastic, there is a savings of Rp14,079,792.00. For the procurement cost of Light Blue HDPE Plastic, there is a savings of Rp16,365,627.50. For the procurement cost of White HDPE Plastic, there is a savings of Rp36,853,183.50. For the procurement cost of Light Blue HDPE Plastic, there is a savings of Rp26,275,091.00. It can be seen that the total inventory cost using the continuous review method is considered more efficient and can also have safety stock and reorder points.

Analisis kondisi perkerasan lentur pada Jalan Margomulyo Kecamatan Asemrowo Kota Surabaya dengan metode Pevement Condition Index (PCI)

2024-11-30T06:14:37+00:00

Margomulyo Street is in Asemrowo District, which is an area in West Surabaya that is famous for its industrial and warehouse complexes. The dense traffic of heavy vehicles such as trailers and other logistics trucks around industrial areas is the main cause of road pavement structures becoming susceptible to damage, including cracks, holes, and deformation. To maintain the pavement structure at the planned service level, a series of actions are called maintenance and repair. Therefore, to evaluate more deeply the condition of the road pavement, the Pavement Condition Index (PCI) method is used. Based on the results of the visual survey, there are several damages and percentage values, namely Weathering and Raveling (46,94%), Rutting (26,35%), Alligator Cracking (11,68%), Corrugation (5,17%), Longitudinal & Transverse Cracking (3,36%), Block Cracking (3,20%), Depression (1,30%), Potholes (1,07%), Patching & Utility Cut Patching (0,66%), Bleeding (0,24%), dan Edge Cracking (0,04%). And based on the results of data analysis, the PCI value on Margomulyo Road is 56.21% (Good).

Analysis of Musculoskeletal Disorder (MSDS) factors in production operator employees using the Quick Exposure Checklist (QEC)

2024-11-30T06:12:28+00:00

Production department operators perform repetitive work processes continuously, resulting in muscle and joint disorders. The purpose of this research is to identify early and provide preventive strategies for the potential occurrence of diseases due to musculoskeletal disorder complaints. (MSDs). This research is a qualitative study that involves direct observation of the subjects and interviews with sources to collect data using the Quick Exposure Check method. (QEC). The QEC results show that the wave solder workstation has the highest score with a total score of 141 and an exposure score of 80%. The cutting-point workstation has a score of 127 and an exposure score of 72%. The printing workstation has a score of 126 and an exposure score of 78%. The visual inspection workstation has a score of 107 and an exposure score of 61%. Therefore, the priority body parts are back with the highest total score of 30, the arms/shoulders with the highest total score of 36, and the wrists with the highest score of 40.

Analisis rantai pasok bahan baku utama ayam pada rice bowl di UKM Tahu Baso Miwiti

2024-11-26T11:54:49+00:00

This study aims to determine the analysis of the chicken raw material supply chain at the Rice Bowl at Miwiti SMEs using a qualitative descriptive approach method based on the results of interviews and direct observations at the Miwiti SME location. The results of the study indicate that the supply chain at the Rice Bowl at Miwiti SMEs cannot be separated from the Upstream supply chain, Internal supply chain, and Downstream supply chain. These results indicate that the upstream supply chain is related to the activity of supplying raw materials starting from chicken traders at Pasar Anyar Bogor - processing into chicken rice bowls - rice bowls at Miwiti SMEs. The internal supply chain includes procurement of raw materials - washing - cutting - draining water - seasoning - frying - draining oil - packaging. The downstream supply chain includes distribution activities to end consumers. The supply chain that occurs at Miwiti SMEs is running well from the procurement of chicken raw materials from suppliers to customers.

Perencanaan kebutuhan bahan baku untuk kelancaran produksi guna memenuhi permintaan (Studi kasus : UD. Maju Jaya)

2024-11-26T03:05:47+00:00

Maju Jaya is a furniture manufacturer in Surabaya that faces challenges in managing raw materials, especially camphor wood lonjoran, which causes production delays and customer dissatisfaction. This study aims to improve efficiency through forecasting raw material requirements using the Exponential Smoothing method with alpha 0.2, which has been proven to produce the lowest MAD value. The forecast results are used in production planning using the Chase Strategy method to flexibly adjust workforce capacity. Material Requirements Planning (MRP) analysis shows the need for repurchasing certain raw materials to prevent shortages. Stock monitoring and timely procurement of raw materials are recommended to ensure smooth operations and meet delivery schedules.

Analisis logika Fuzzy Sugeno dan Pengambilan Keputusan untuk meningkatkan produksi roti manis pada Tandi’s Homemade Bakery

2024-11-23T09:21:26+00:00

Tandi’s Homemade Bakery, a small-medium enterprise, faces challenges in improving the quality and quantity of its sweet bread production, particularly in optimizing the production process and determining effective strategies. This study aims to analyze decision-making using the Fuzzy Sugeno Logic and Analytical Hierarchy Process methods as approaches to support production enhancement. The Fuzzy Sugeno method is applied to evaluate bread maturity levels based on parameters such as dough kneading time of 43 minutes, baking temperature of 173 degrees Celsius, and baking time of 60 minutes, with the goal of identifying optimal conditions to achieve high-quality bread. Meanwhile, the Analytical Hierarchy Process method is employed to establish alternative strategies for production improvement by analyzing criteria such as product quality, raw material efficiency, and operational costs. The findings suggest that integrating Fuzzy Sugeno and Analytical Hierarchy Process methods can provide structured planning recommendations, supporting Tandi’s Homemade Bakery in making informed decisions to enhance sweet bread production with superior quality.

Studi penambahan chemical pada produk migas guna mengurangi dampak negatif terhadap lingkungan proses distribusi

2024-11-22T03:49:48+00:00

The distribution of fuel impacts the environment through emissions and combustion residues. This study evaluates hydrocarbon compounds in petroleum products with ethanol addition to enhance octane ratings and reduce emissions. Gravimetric methods assessed ash content, FTIR analyzed organic compound absorption via functional groups, and UV-Vis spectrophotometry measured toluene levels through absorbance. Results showed ethanol blending with biodiesel reduced ash content from 74.48 mg/L to 64.99 mg/L, a 9.4% decrease, indicating a positive environmental impact. UV-Vis analysis revealed increased toluene content, reflecting higher octane value and potential emission reductions. Additionally, blending Pertamax with ethanol showed increased oxygenated compounds, such as alcohols and esters, at a 1600 nm wavelength. In conclusion, adding ethanol positively affects the environment by reducing emissions and improving octane ratings. However, further analysis is needed to comprehensively assess its environmental impact.

Analisis kekuatan tarik pada proses pengelasan SMAW baja selindris AISI 1045 dengan variasi merek elektroda

2024-10-20T07:36:39+00:00

Karakteristik ruas jalan nasional Suramadu Kabupaten Bangkalan STA 7+400 s.d STA 11+400

2024-11-17T09:59:37+00:00

The Suramadu National Road is an important infrastructure that supports transportation access and the economy of the people of Bangkalan District and its surroundings. Road Functionality Tests are carried out to ensure that the road meets functional suitability standards that provide smoothness, safety and comfort for users. This research aims to identify the condition of functional fitness and assess the star rating score on the Suramadu National Road. Data collection was carried out based on Minister of Public Works Regulation Number 2 of 2022 concerning Procedures and Requirements for Road Functionality. The results of the analysis show that the 4 km Suramadu National Road section in Bangkalan Regency has quite good functional fitness, although there are several segments that do not meet standards, such as unofficial U-turns at several points and dead public road lighting. The condition of the road pavement was also found to be poor at several points. Overall, the Suramadu National Road received a Star Rating Score of 5.97 with a Star Rating category of 3, which shows that this road is suitable for operation in accordance with PUPR Ministerial Regulation No. 4 of 2023. According to Circular Letter Number 11/SE/Db/2024, this road is considered to meet the safety category. However, technical improvements are needed to achieve a safer road category with a Star Rating target of 4 and 5.

Factors affecting the decline in sea toll profits

2024-11-15T12:51:32+00:00

The Sea Toll Program represents Indonesia's strategic maritime connectivity initiative aimed at facilitating goods distribution, particularly in underdeveloped, remote, outermost, and border regions (3TP). This study examines the factors contributing to the program's declining profitability using qualitative methodology with an ethnographic approach through interviews, observations, and literature review. The research findings identify three primary factors: the high cost of replacement vessel rentals, reaching IDR 800 million per two months; port time exceeding the Department of Transportation's targets due to limited loading and unloading infrastructure; and difficulties in accessing fuel vendors in 3TP regions. These findings indicate the necessity for enhanced port infrastructure and operational efficiency to optimize the profitability of this program, which is vital for national economic equity.

Dampak perubahan iklim terhadap produktivitas kelapa sawit (elaeis guineensis jacq) di PT Inti Indosawit Subur Desa Delima Jaya Koperasi Mulus Rahayu

2024-11-14T06:47:29+00:00

The productivity of oil palm plants is influenced by environmental factors, namely climate, which plays an important role, so a study was carried out regarding the impact of climate change on oil palm productivity. This research is to produce palm oil productivity based on rainfall and temperature data. The research method uses correlation analysis and multiple regression. Correlation analysis functions to determine the relationship between air deficit and palm oil FFB productivity in accordance with the research data obtained and to determine the direction of the relationship that occurs. This data was analyzed using descriptive statistical methods and analyzed using multiple regression. From the research results it was concluded that: 1). Climate change (temperature) has a low relationship to palm oil productivity. Temperature does not have a significant effect on oil palm productivity. 2). The rainfall variable is 0.010 > probability 0.05, so it can be concluded that rainfall has a low relationship to Palm Oil Productivity, meaning that there is a significant influence between rainfall (X2) on Productivity (Y).

Penentuan jumlah produksi kimbab berdasarkan jumlah permintaan dan persediaan menggunakan metode Fuzzy Mamdani

2024-11-14T06:45:56+00:00

Nanda Kitchen is a home-based cafe that produces various kinds of Korean specialties, specifically kimbab. The large demand for kimbab signifies that Nanda Kitchen is frequently engaged to the stockouts of raw material supplies. Thus, kimbab production is unable to fullfil consumer’s demand. The intention of this research is to ascertain the appropriate amount of kimbab production. Effective demand forecasting is required to fullfil customer’s demand by sufficient raw material supplies. Demand forecasting was carried out using POM-QM for Windows with Moving Average (n=3) and Exponential Smoothing (alpha 0.3 and 0.5). The lowest error value is taken to implement Fuzzy Mamdani (MATLAB). Exponential Smoothing (?=0.5) is most proper method for forecasting demand (error value of 7.6%). Nanda Kitchen needs to produce 1460 kimbabs with input demand of 1473 and raw material supply of 2470 based on Fuzzy Mamdani.

Analisis index kerusakan Jalan Rigid Pavement dengan metode Pavement Condition Index (PCI) pada Jalan Lebaksono – Jalan Purwojati Ngoro, Kabupaten Mojokerto

2024-11-14T07:42:50+00:00

The lebaksono - purwojatingoro mojosari city is an industrial road. Various heavy and light vehicles pass through the road, causing road damage. Evaluation of road damage conditions is needed to monitor the level of road damage that occurs on a road section. This study aims to determine the level of damage that occurs. The method used in assessing the condition of this pavement damage is the PCI (Pavement Condition Index) method, conducting a visual survey by viewing and analyzing damage based on the type, level of damage and quantity of damage to serve as the basis for carrying out maintenance and repair activities. . The results of evaluating the condition of the lebaksono - purwojatingoro road section using the PCI method obtained divided slab damage (26.2%), patching small (7.82%), spalling corner (5.07%), shrinkage cracks (0. 85%), line crack (17.18%), spalling joint (4.79%), patching large (22.82%), punchout (0.85%), corner break (10.42), joint seal (1.13%), durability crack (0.85%), blow up / buckling (0.28%), popout (1.69%).

Systematic literature review : Efektivitas penggunaan media digital sebagai instrumen evaluasi dalam Pembelajaran Kejuruan di SMK

2024-11-12T04:51:27+00:00

Vocational education in Vocational High Schools (SMK) plays an essential role in equipping students with relevant skills. To ensure a successful learning process, regular evaluation is needed. This study aims to analyze the effectiveness of using digital media as an evaluation tool in vocational education at SMK. Using a systematic literature review method, this study examines various relevant scholarly articles on the implementation of digital evaluation media in vocational subjects at SMK. The findings indicate that digital evaluation tools, such as Wordwall, Quizizz, Edmodo, Kahoot, and Google Forms, play a significant role in improving student outcomes, engagement, and motivation. These digital tools facilitate interactive and efficient evaluation, support more adaptive and objective assessment processes, and provide faster feedback.

Analisis tata letak ruang pada Toko Ritel Pelita dengan metode Activity Relationship Chart (ARC) dan Total Closeness Rating (TCR)

2024-11-10T12:44:46+00:00

Store layout plays an important role in optimizing the shopping experience and operational efficiency of stationery retail stores. This study aims to analyze the suitability of layouts in Pelita retail stores with the Activity Relationship Chart and Total Closeness Rating approaches. Data collection methods include primary and secondary data. Primary data is obtained through interviews and field observations, while secondary data is used to strengthen primary data. Linkages between store spaces facilitate employee operations and area access for customers, thus creating a comfortable shopping experience. The results of the Activity Relationship Chart and Total Closeness Rating analysis show that display shelves have the highest value of 174, which means the importance of product placement is easily accessible to customers. In addition, areas with high proximity relationships with display shelves, such as parking lots and cashiers are placed close together to facilitate customer access and speed up the shopping process.

the Sistem pendukung keputusan pengujian kendaraan inspeksi keselamatan (rampcheck) menggunakan metode Analitycal Hierarchy Process (AHP) di Terminal Purabaya

2024-08-09T03:43:59+00:00

Transportation plays an important role in the economic and social development of a country, especially in the era of globalization. Especially public transportation, public transportation serves to connect rural areas with urban centers, plays an important role in maintaining community mobility and supporting economic development, especially bus transportation. The technical inspection process or rampchcek on buses at the terminal is a critical step in ensuring transportation safety and security. This study discusses the stages of rampchcek and the criteria used in vehicle testing at Purabaya Terminal. The problems to be discussed in this study are: (1) What is the priority order of criteria in determining the roadworthiness of bus transportation? (2) Which bus transportation should be declared roadworthy by the Purabaya Terminal rampcheck officer? (3) How does the rampcheck inspection process compare between manual checklists and automatic checklists on bus transportation at Purabaya Terminal? This study uses the AHP (Analytical Hierarchy Process) method as an approach to improve the rampcheck decision-making process. From the results of the assessment of the level of importance of criteria in determining the roadworthiness of bus transportation produces a priority scale or weight as follows: priority I administrative elements (0.54), priority II main technical elements (0.39), and priority III supporting technical elements (0.07). from the results of the assessment of the level of importance of alternatives in determining the roadworthiness of bus transportation produces a priority scale or weight as follows: priority I bus jaya utama indo (2.12), priority II bus eka (0.64), and priority III bus sugeng rahayu (0.24). based on the results of the calculation of the AHP (Analytical Hierarchy Process) method in determining the roadworthiness of bus transportation. Jaya Utama Indo is considered the best bus transportation. Furthermore, Eka as the second bus transportation. And Sugeng Rahayu as the third bus transportation.

Strategi peningkatan penjualan sparepart dengan mengintegritaskan analisis SWOT dan metode AHP pada CV. Jaya Maju Perkasa

2024-09-10T09:14:40+00:00

Human resources are one of the resources in the form of humans based on energy or thoughts that are used to develop a better company in the future. If the human resources used are less skilled or less good, it will greatly affect the products or work results provided. This is felt by a manufacturing company in the furniture sector, namely PT. Omega Mas. In order to understand the level of employee performance produced, PT. Omega Mas needs to conduct an employee performance assessment. In this employee performance assessment, the rating scale method with AHP is used. While in collecting data using questionnaires and brainstorming. The results obtained were that there were 5 employee performance assessment criteria with each criterion having 3 sub-criteria. These criteria are self-maturity, work attitude, cooperation, discipline, and Work Results. In the weight of employee performance assessment, the dominant one is Work Quantity with a weight value of 0.311. In the performance results, there were 6 employees who had very good scores, 47 employees had good scores, and 80 other employees had sufficient scores.

Analisis tekno ekonomi sistem hidrogen hijau dengan model matlab simulink di Lombok Indonesia

2024-08-24T08:05:28+00:00

This research conducts a techno-economic analysis of a green hydrogen system in Lombok, Indonesia, using a MATLAB Simulink-based simulation model. The primary objective of this study is to evaluate the long-term economic feasibility of a green hydrogen project through the analysis of key financial parameters such as Net Present Value (NPV), Internal Rate of Return (IRR), and the break-even point. The model simulation results show that the production output of green hydrogen is 121,391 kg, and the project generates a Net Present Value (NPV) of $1,205,031.1 over a 25-year operational period. The Internal Rate of Return (IRR) of the project reaches 11.9%, indicating that the project has a promising profit potential. Additionally, the break-even point is achieved in the 8th year, meaning that the initial investment can be recouped by that time. These findings provide an initial overview of the economic prospects of green hydrogen development in Lombok and demonstrate the potential of green energy in supporting the energy transition in Indonesia. This study also offers guidance for policymakers and investors in making strategic decisions related to investments in renewable energy technology.

Usulan kebijakan persediaan material untuk meminimasi overstock menggunakan newsvendor model pada PT. XYZ

2024-08-23T04:36:09+00:00

PT XYZ is a company engaged in the concrete manufacturing industry. Concrete production at PT XYZ affects the inventory of constituent materials needed in making concrete. The problem of PT XYZ, there is an overstock of basic materials, because there is a gap between the amount of basic material inventory and demand. So, it is necessary to propose an inventory policy to minimize overstock. The problem-solving method used in this research is ABC Analysis to determine the classification of each material and the new vendor model to determine the amount of material inventory. Based on calculations using ABC analysis, material classification is obtained based on three categories, category A one type of material, category B two types of material, and category C four types of material. Calculations using the newsvendor model obtained a decrease in total inventory costs by 10.8% and the amount of material inventory by 20.4%.

Perancangan model bisnis dengan triple layered business model canvas untuk pengembangan UMKM Kecap Segi Tiga Majalengka

2024-10-21T18:53:39+00:00

This study aims to design a business model that supports the development strategy of the soy sauce business in UMKM Kecap Segi Tiga Majalengka, using the Triple Layered Business Model Canvas (TLBMC) approach. This research identifies the company's strategic position through SWOT analysis and determines strategy priorities using the Analytical Hierarchy Process (AHP) method. The samples used include owners, managers, production staff, marketing, customers, and representatives of the industrial office. The results of the SWOT analysis show that the Kecap Segi Tiga MSME is in a grow and develop position (quadrant I), which requires a growth strategy. The highest weight in the AHP analysis for the economic layer was found in revenue streams and cost structure (score 0.33297), the environmental layer in functional value and materials (score 0.1890), and the social layer in employee aspects (score 0.2830). This proposed business model is reorganized in the form of TLBMC to support the development of MSMEs.

Rancang bangun early warning system pada perlintasan sebidang berbasis mikrokontroller dengan lora dan SMS gateaway

2024-10-11T09:38:54+00:00

Level crossings between roads and railway tracks in Indonesia still face significant safety challenges. According to the Indonesian Minister of Transportation Regulation Number 94 of 2018, an automatic early warning system without guards is required. Some locations, such as those under the supervision of the Madiun Service Unit and the Class 1 Surabaya Railway Technical Center, have been equipped with systems made by PT Wantech, but many are non-functional. This study aims to create a microcontroller-based early warning system using LoRa and SMS Gateway technology as a temporary replacement. Using the waterfall method and mean absolute error, this study compares the HC-SR04 and HY-SRF05 ultrasonic sensors. The results show that HY-SRF05 is superior in detecting trains, with an average data transmission time of 2.5 seconds for distances up to 1.5 km using LoRa, and the SMS Gateway successfully sent warning notifications at the same distance. This system is expected to improve the safety of road users and train journeys

Sistem pendukung keputusan dalam menentukan balita stunting menggunakan metode Simple Additive Weighting (SAW) berbasis website

2024-08-18T10:01:51+00:00

The health center that has the highest prevalence of stunting in Sleman Regency is the Minggir health center at 13.15%. The results of interviews with nutrition officers for toddlers at the Minggir Health Center showed that there were still toddlers with poor nutritional status. In addition, the nutrition service system for toddlers has not functioned properly. Because such suboptimal performance will, it is easier to create a system that can handle or minimize such problems. Thus, building a decision support system can be a solution to the problem that occurs. The SAW method is one of the methods used and the system is designed using the PHP programming language, MySQL database and laravel framework. The research resulted in the creation of a website that can determine the nutritional status of stunted toddlers at the Minggir Health Center Posyandu. This system is designed according to the needs based on the criteria that have been set by the nutrition officer. In the application test, the preference values and nutritional status results obtained from calculations using the system were in accordance with the results of manual calculations with Excel and the nutritional status determination system was as expected.

Pengaruh acid wash cell elektrolyzer terhadap kenaikan nilai k faktor pada unit chemical making 13 PT. Indah Kiat Pulp and Paper tbk. Perawang – Riau

2024-09-06T23:23:52+00:00

Sodium chlorate (NaClO3) is used to produce clorine dioxide (ClO2), which is used in the bleaching process in the pulp and paper industry. Sodium chlorate is produced in the industry by electrolysis process. This electrolysis process produces 2 main products, namely hydrogen and sodium chlorate. hydrogen is used in the process of making hydroclorid acid (HCl) and sodium chlorate is used in the process of making ClO2. In the process of making chlorate there are several things that must be considered, including: pH, oxygen levels in the degasifier, conditions of the hypo tower system, salt and chlorate concentration, and K cell factor. Based on the results of the above analysis, it can be seen that the acid wash cell is able to reduce the K factor of the cell. Do not run the electrolyzer if the cell voltage is above 3.5 volts. This is because at a voltage above 3.5 volts oxygen formation occurs, if oxygen meets hydrogen gas from electrolysis can cause an explosion.

Perhitungan efesiensi absorber pada proses ClO2 integrated chlorine dioxide pada unit plant CM2

2024-09-06T23:16:09+00:00

This study focuses on 1) Calculating the efficiency of the absorber in the Chemical making-2 Unit (CM11); 2) Finding out the factors affecting the efficiency of the absorber in Chemical making-2 (CM11). The adsorption study used a batch system. Based on observations that have been made regarding the Absorber Efficiency in the Chemical Making-2 Unit (CM 11) in the ClO₂ processing at PT Indah Kiat pulp & paper Tbk. Perawang, it can be concluded that: 1) Absorption is a separation process by contacting a mixture of gas with an absorption liquid which aims to remove one of the gas components. Which here uses chilled water to absorb ClO₂, the absorber used is a tray type. 2) The Absorber Efficiency obtained is 99.5%. 3) What affects the performance of the absorber in CM-11 is the placement of the Tray used and the age of the equipment used which affects the concentration of the product obtained. The concentration obtained is 9.5 gpl, this figure is categorized as meeting the standard because the ClO₂ standard used by PT. IKPP Tbk. The clairvoyant is in the range of 9.5-10 gpl.

Identification of test liner paper production errors through six sigma DMAIC perception

2024-09-10T08:59:25+00:00

To achieve normal quality, organizations must be able to be aware of and check factors that can affect product quality. Quality control aims to reduce the number of defective or damaged goods, ensure the final results provided comply with company quality guidelines. PT Lohdjinawi Widjaya is a company that produces paper in Indonesia, one of its products is test liner paper. This can be seen from production data for the last 4 days of August with total production of 953,625 kg and total defects of 35,084 kg. From the results of research and data processing using the Six Sigma DMAIC method, it can be concluded that the biggest defect in test liner paper products at PT. Lohdjinawi Widjaya total broken edge defects 18,400 kg or 52%, damaged cross-section 12,406 kg or %. The research results showed that the lowest Six Sigma level results were 3,55 on the fourth day and the highest on the first day was 4,08. Four factors influence product quality including materials, people, methods, and machine.

Analisis proses pengendalian kualitas produk X menggunakan metode Fault Tree Analysis (FTA) pada PT XYZ

2024-08-08T13:23:52+00:00

Packaging X is a folding carton packaging that has many product defects that do not meet predetermined standards, with an average defect of 19.40% during the period March 2023 to February 2024, exceeding the company's tolerance target of 3%. This study aims to identify the types of defects and the factors that cause them, as well as to provide suggestions for improvements related to the problem of product defects. The method used in this research is the Fault Tree Analysis method with pareto diagram analysis. The results showed six types of defects in X packaging, including light color (6.7%), flooding (17.2%), bulky color (5.8%), glue bleber (55%), wrinkle (8.6%), and powder (6.7%). Based on the fault tree diagram, there are 5 (five) top events, namely humans, machines, materials, methods, and the environment. The proposed improvements are creating new work standards, modifying packaging design, improving supervision, asking maintenance to monitor machine conditions, repairing blisters and preparing spare parts stock, wrapping paper with wrap, improving machine stability control, and scheduling machine area cleaning.

Sistem prediksi pengadaan stok bahan baku kayu menggunakan Metode Double Exponential Smoothing (Studi Kasus: CV. Jati Sari)

2024-08-05T07:03:11+00:00

In managing the supply of wood raw materials at CV. Jati Sari is still carried out based on the personal experience of business entity owners. Because it is based on personal experience without carrying out in-depth analysis or forecasting, it will create a risk of excess or shortage of stock, making stock management inefficient. The software development method used is the Waterfall method. Double Exponential Smoothing is implemented in this research as a forecasting prediction calculation method. This research produces a prediction system that can produce output in the form of a predicted amount of wood needed as inventory or stock in the warehouse in cubic meters. For manual calculations, the DES method has a prediction calculation result for the 21st period of 4.8 m3. Based on the system testing using black box and white box testing that has been carried out, it can be concluded that the prediction system for procurement of wood raw material stock using the website-based Double Exponential Smoothing method has succeeded well in solving the problem of predicting the amount of wood raw material stock for the next period at CV. Jati Sari.

Analisis pengukuran kinerja karyawan menggunakan metode Human Resource Scorecard (HRSC) di UPT Industri Kayu dan Produk Kayu Pasuruan

2024-08-04T08:09:44+00:00

This research aims to analyze employee performance measurements at the Pasuruan Timber and Wood Products UPTI using the Human Resource Scorecard (HRSC) method. The HRSC method is used as a holistic approach in evaluating employee performance by paying attention to financial aspects, customers, internal processes, as well as growth and learning. This research explores data through in-depth interviews and direct observation of HR management practices at UPTI. Data analysis was carried out to identify the main factors that influence employee performance in the organization using guidelines and metrics provided by HRSC. It is hoped that the research results can provide in-depth insight for the management of Pasuruan Wood and Wood Products UPTI in improving employee performance, identifying areas that need improvement, and increasing overall effectiveness. It is hoped that the findings from this research can become the basis for developing more effective human resource management strategies and can better support the achievement of organizational goals.

Sistem Pendukung Keputusan Pemilihan Bimbingan Belajar Terbaik Kota Pekalongan Menggunakan Metode Promethee

2024-08-02T07:48:23+00:00

Tutoring institutions for elementary school levels have been proliferating in Pekalongan City due to the large number of elementary school students, totaling 18,356 students spread across 103 schools. Finding the right tutoring center that meets specific needs can sometimes be challenging. This study aims to assist with this by developing a decision support system. Using the Promethee method, which offers a more detailed evaluation of multiple criteria, the system is expected to provide a suitable decision support solution. This research produces a web-based decision support system that parents can use to find a tutoring center that meets their desired criteria.

Perilaku Penggunaan Alat Pelindung Diri (APD) Pekerja Tenaga Kerja Bongkar Muat (TKBM) di PT. XYZ

2024-08-01T07:42:29+00:00

PT XYZ, a state-owned port services company, faces significant occupational health and safety risks, particularly for loading and unloading workers (TKBM), who often lack discipline in using personal protective equipment (PPE). This study aimed to assess TKBM workers' behavior regarding PPE usage. Utilizing a cross-sectional observational approach, the research surveyed 71 out of 249 TKBM workers. The findings indicate that most workers exhibit good PPE usage behavior. Despite this positive outcome, the research suggests enhancing PPE use through targeted training and briefings. Continuing efforts to bolster worker safety and PPE awareness are crucial for maintaining and improving safety standards in PT XYZ's loading and unloading work environments focusing on worker protection through the behavior of using PPE.

Analisa Kerusakan Komponen dan Interval Waktu Perawatan Unit Mobil Avanza (Studi Kasus: PT. XYZ Surabaya)

2024-07-23T00:11:07+00:00

This study aims to enhance the reliability of PT. XYZ Surabaya's rental fleet, which experienced numerous incidents of damage to Avanza units from 2019 to 2023. The Westinghouse analysis method was employed to determine repair intervals and calculate the Mean Time to Failure (MTTF) for component replacements. The findings revealed that the oil filter and clutch assy components were the most frequently damaged. The oil filter requires replacement every 1460 hours (60 days) with a reliability of 52.31%, while the clutch assy needs replacement every 3429 hours (142 days) with a reliability of 46.78%. The performance of mechanics in replacing these components was also analyzed to improve efficiency. This study assists PT. XYZ in minimizing downtime, extending component lifespan, and enhancing operational efficiency, ultimately contributing to customer satisfaction and the sustainability of the vehicle rental business.

Analisis pengendalian persediaan bahan baku foot step menggunakan metode Economic Order Quantity (EOQ) pada CV Anugerah Teknik

2024-07-20T01:38:41+00:00

This study aims to determine whether inventory control of foot step raw materials with the Economic Order Quantity (EOQ) method is more efficient than the conventional method used by CV Anugerah Teknik. This research involves the calculation and comparison of the amount and frequency of ordering foot step raw materials. Data was collected through field and literature studies. The results showed that the frequency of ordering with the conventional method was 6 times with an average of 2,100 kg per order, while the EOQ method suggested 3 times with an average of 1,698 kg per order. CV Anugerah Teknik has not determined the safety stock, while the EOQ method recommends 514 kg. The reorder point applied by CV Anugerah Teknik is 2,000 kg, while the EOQ method recommends 2,032 kg. In 2022, the total cost of inventory with the EOQ method is lower at Rp 1,518,484,129 compared to the conventional method of Rp 1,760,469,931. In conclusion, inventory control of foot step raw materials is more optimal with the EOQ method than the conventional method applied by CV Anugerah Teknik.

Investigasi Interleaved Boost Converter menggunakan kontrol state feedback untuk pengisian baterai

2024-09-17T13:30:26+00:00

This study aims to analyze the performance of the Interleaved Boost Converter (IBC) in battery charging applications using three control methods: Open loop, PID, and State feedback. The introduction highlights the importance of stability and efficiency in battery charging to enhance battery life and performance. Simulations were conducted to evaluate the system's response to each control method. The Open loop method produced an output voltage of 35V with a fast response time of 24.036 ms but suffered from significant ripple. PID control improved stability with a lower overshoot (0.248%) but slower response time (26.730 ms), and the ripple remained visible. The State feedback method, especially with a matrix gain of K2 = [-1 10 15], yielded the best performance, achieving the fastest response time of 4.779 ms, an overshoot of 0.497%, and no ripple in the output voltage. Based on these results, State feedback control is recommended for battery charging applications requiring stable and efficient voltage. PID control can be an alternative but requires further tuning for optimal performance.

A binary logistic regression analysis of factors influencing repeat purchase for snack product x

2024-10-15T08:34:15+00:00

This study aimed to analyze the factors influencing repeat purchase of product X, a popular snack product in Indonesia, using binary logistic regression. Data were collected through an internal questionnaire distributed to 100 respondents and analyzed using SPSS. The results showed that among demographic variables, social media usage, product perception, and the influence of TV advertising, only the TV advertising variable had a significant effect on repeat purchase. Respondents exposed to TV advertising were 3.877 times more likely to make a repeat purchase. The resulting binary logistic regression model had a prediction accuracy of 77.2%. However, the prediction accuracy for non-repeat purchase was still low (8%), indicating the presence of other unidentified factors. It is recommended that the marketing team of company X conduct research on TV advertising concepts that are in line with the target market, implement a marketing mix between TV channels and social media, explore alternative media channels to support TV advertising, and maintain product quality and brand image.

Women in mining: an ethnographic study of heavy equipment operators in Indonesian coal industry

2024-10-15T08:29:42+00:00

This research investigates the factors motivating women to work in the traditionally male-dominated mining industry, focusing on heavy equipment operators at a coal mine in Sangatta, East Kalimantan, Indonesia. Employing an ethnographic approach with a phenomenological study design, data were collected through in-depth interviews with three informants with varying lengths of work experience to identify shared values. The findings reveal three primary factors underpinning women's decisions to pursue mining careers: strong work ethic, economic motivations, and an orientation towards self-development and securing their children's future. These findings demonstrate women's agency in career decision-making and their ability to transcend gender stereotypes. This study recommends that mining companies foster inclusive work environments that support women in balancing their multiple roles.

Market segmentation analysis to find out products and services that suit customer needs using the python KMEANS clustering method (Case study: Superindo Tambun Area, Bekasi)

2024-10-15T07:28:57+00:00

This study analyzes market segmentation of 1000 Superindo consumers in Tambun, Bekasi, using K-Means Clustering with Python 3.10. Variables included age, gender, occupation, purchase amount, product type, and discounts. Three main segments were identified: "Business Women" (average age 40, focus on staple goods, 16% discount), "Women Government Career" (age 39, staple goods, 16% discount), and "Professional Women" (age 38, staple goods, 15% discount). Superindo should target "Women Government Career" with the highest purchasing power. To increase sales, an online value proposition is recommended offering bundled packages of staple goods with meat and fruit.

Analisis SWOT (Streght, Weakness, Opportunity, Threats) untuk menentukan strategi pemasaran produk pelatihan pada lembaga pelatihan

2024-10-12T07:43:21+00:00

PT. Indonesia Satu Persada is one of the companies that provides occupational health and safety training and certification. At PT. Indonesia Satu Persada sees that the marketing strategy is less than optimal because the very large market share is not directly proportional to market absorption by PT. Indonesia Satu Persada, therefore it is necessary to conduct an appropriate marketing strategy analysis. The research method used is by using the SWOT method, then an analysis is carried out through efas and ifas to determine the right marketing strategy. After the analysis and calculations were carried out, several activities were obtained that the company needed to do in order to be able to optimize marketing, including conducting new training material topics according to consumer demand, opening cooperation with campuses and providing competitive prices for students, monitoring government regulations related to special training obligations which can then be held at ISP, adding admins and reviewing cooperation with the issuing party of professional certificates in order to be able to carry out administration quickly.

Evaluasi alat pemadam api ringan di kantor induk PT. PLN (persero) unit induk transmisi Jawa bagian timur dan Bali

2024-11-02T04:13:22+00:00

Fire is an oxidation event involving fuel, oxygen, and energy sources that can cause property. The requirements and implementation of this method using scientific methods such as inspection sheets as a tool to help solve the analysis. The results of the study from a total of 49 APAR were examined. From the results of the inspection that has been carried out, it was found that the indicator of the need for APAR in each room is an excess number of APAR, this is not a problem, the condition of the APAR has been appropriate but there are some that are not appropriate, the maintenance of APAR is only a few APAR that are checked routinely. In conclusion, although the number and type of APAR in each room are adequate, suggestions are needed to improve APAR, installation signs, placement of APAR, and maintenance of APAR to ensure safety.

Penerapan metode fuzzy analytical hierarchy process pada penentuan prioritas perawatan komponen jalan rel

2024-12-03T04:15:05+00:00

This study uses the fuzzy analytical hierarchy process (FAHP) method to determine the maintenance priorities of railroad components on the section between Caruban Station - Babadan Station KM 155+000 to KM 157+200. FAHP was applied to evaluate and prioritize based on criteria including human resources, material, cost, risk, and level of damage, with participation from experts and academics. FAHP analysis showed that risk was the first-order criterion in priority assessment with a value of 0.31, followed by damage level with a value of 0.29, cost with a value of 0.17, material with a value of 0.14, and human resources with a value of 0.10. The resulting maintenance prioritization shows that ballast addition is the most urgent measure with the highest priority value of 0.54, followed by rail and sleeper maintenance with values of 0.27 and 0.18 respectively. The results of this analysis indicate a need for 1,456.60 m³ of additional ballast as a priority measure in the repair of railroad components in the studied segments.

Preservasi jalan secara long segment ruas jalan Wawotobi – Lasolo

2024-10-29T15:53:38+00:00

The implementation of long segment-based contracts which is considered new for service users and large contractors, the implementation of roads. So it is necessary to understand the system. The parties have difficulty implementing the standards that have been determined and understanding the scope of the work being carried out, resulting in the implementation of long segment-based work not being carried out effectively until now. Seeing the above problems, this research was carried out to The method used in this study uses the Importance perpormance analysis (IPA) questionnaire method. In accordance with the limitations of this study, the number of respondents used was 30 service users and 30 service providers at the Southeast Sulawesi Road Implementation CenterThe method used in this study used the Importance perpormance analysis (IPA) questionnaire method. In accordance with the limitations of this study, the number of respondents used was 30 service users and 30 providers Factors of understanding from Officials Commitment Makers (PPK) as service users place understanding in contract law as the dominant factor with weight (0.195), while service providers/contractors place the ability to understand contract law as the dominant factor with weight (0.206).

Analisis ergonomi lingkungan kerja fisik pada karyawan bagian laboratorium produksi

2024-09-29T02:12:28+00:00

This research aims to analyze the impact of the physical work environment on employee performance at company X. An optimal physical work environment is identified as a key factor in increasing employee productivity and satisfaction. Through a quantitative approach, data is collected through employee surveys and physical work environment observations. An in-depth discussion of the implications of the findings for improving the physical work environment and company policies will be presented. This research is expected to make an important contribution to understanding the role of the physical work environment in improving employee performance, as well as providing a basis for companies to develop appropriate improvement strategies. The conclusion highlights the urgency of paying attention to the physical work environment as an investment to achieve optimal performance and employee satisfaction at company . These results show a figure of 71.2 dBA in noise calculations and 13.84 or 14 light points in lighting calculations, all of which indicate that the room is ergonomic enough for employees.

Analisis persediaan dengan Economic Order Quantity di UMKM Kacang Atom di Tanah Datar, Sumatera Barat

2024-01-26T04:15:13+00:00

MSME GDR peanuts are one of the MSMEs in Tanah Datar, West Sumatra. The surge in production and product demand in the market has created challenges for these MSMEs, and they are experiencing difficulties in determining the amount of raw material supply or inventory needed. This research aims to calculate the inventory of GDR Nuts, determine what factors influence inventory planning in GDR Nut MSMEs, and calculate the amount of safety stock and ROP. The method used to overcome this problem is the EOQ (Economic Order Quantity) method to determine economic purchases for Nut MSMEs. The data processing and analysis results show that the ordering of raw material supplies in GDR MSMEs was 1.6 times with order results of 92,156 kg using the EOQ method. The leading cause of this inventory problem is the need for more implementation of effective operational management and inaccuracies in inventory calculations. As a result, there is often a need for more raw materials. To overcome this, GDR MSMEs have a safety stock of 977.3 kg and a reorder point of 13,153 times.

Investigasi Interleaved Boost Converter menggunakan kontroler Linear Quadratic Regulator (LQR)

2024-09-18T01:11:42+00:00

The Boost DC-DC Converter plays a significant role in renewable energy applications and electric vehicles, serving to increase the output voltage from low-voltage sources. This study aims to analyze the performance of the Interleaved Boost Converter with Linear Quadratic Regulator (LQR) control compared to open loop and PID control. The research methodology involves designing and simulating the converter using MATLAB/Simulink, where various control configurations are tested to assess their ability to regulate output voltage. Simulation results show that the Interleaved Boost Converter with LQR control produces a stable output voltage of 28 volts with the fastest response time (9.629 µs) and no overshoot. In contrast, the PID control configuration delivers an output voltage of 28.46 volts with a maximum overshoot of 0.510% and a slower response time (25.177 µs). The open loop configuration, despite having the fastest response time (19.768 µs), results in significant voltage ripple. The conclusion of this study emphasizes that LQR control is superior in terms of stability and quick response and is recommended for applications requiring high performance. Future research is suggested to focus on optimizing PID control parameters and evaluating LQR performance under dynamic load conditions

Reducing the rust defect rate of K59 cap fuel filler products in the progressive pressing line using the DMAIC method

2024-09-14T10:54:02+00:00

This research aims to find out how to apply the method to help analysed problems, identify the causes of problems in the production of Cap Fuel Filler K59 at Company defect level in production results. Determining the selected data using purposive techniques. Data collection was carried out by collecting primary and secondary data through literature studies, field studies, observations, interviews and documentation. The data analysis procedure was carried out using the DMAIC method (define, measurement, analyze, improvement and control). After data analysis, improvement efforts are carried out with the following actions: (1) making special placements for re-delivery parts; (2) changing the plastic layer to paper as a base that covers the surface of the box; (3) give skates to the parts in the box in the amount of 2 pcs/column; (4) adding a rust category to the Q-point to be posted in the production and checking area. After carrying out these improvement actions, the number of defects in the products produced decreased and this was indicated by an increase in the sigma value from 3.6% to 3.9%.

Analisis kerusakan dan strategi perawatan pada ketel uap pipa air Miura Eh – 750F di Workshop Politeknik Pelayaran Sumatera Barat

2024-09-12T00:01:09+00:00

Pumps play an important role in moving fluids from one place to another. In this study, the Ebara 125 x 100 FS4KA centrifugal pump was used. The thing that made the author interested in conducting this research was the reduction in the performance of the centrifugal pump to circulate water from the training pool to the holding tank and back to the pool. The aim of this was to determine the factors causing the decline in the performance of the centrifugal pump. The method used is observation through data collection and data processing, data obtained from the field, namely wear and tear on the impeller diameter, which greatly influences pump performance. Before the pump was repaired with an impeller diameter of 245 mm, the pump capacity was 78 m3/hour, the pump hydraulic power was 5.8 Kw, the pump head was 27.4 m, the pump efficiency was 43.20%, and the fluid speed was 1,014 m/sec. After repairing the Ebara 125 x 100 FS4KA centrifugal pump by replacing the impeller size by 250 mm, the performance of the Ebara 125 x 100 FS4KA centrifugal pump increased by 80 m3/hour, pump hydraulic power 6.04 KW, pump head 28 m, pump efficiency of 45.24%, and fluid velocity of 1,032 m/sec.

Literature review : Conditional based maintenance in manufacture industry

2024-09-11T14:22:08+00:00

Manufacturing companies are increasingly dependent on the performance of their equipment to remain competitive. The best performance equipment demands accurate and timely maintenance. ConditionBased Maintenance (CBM) is a strategy to prevent functional failures or a significant performance decrease of the monitored equipment. CBM which relies on a wide range of resources and techniques required to detect abnormal situations or predict the future condition of an asset. This paper will create framework to be a basic of guidlenes for selecting parameters. And emphasize framework with literature reviews. Then develop guidelines based on framework which emphasized by literature review. Finally, examine the guidelines by case studies to evaluate the effectiveness of proposed guidelines

Analisis similarity dan korespondensi terhadap restoran cepat saji menggunakan pendekatan Multidimensional Scaling dan Correspondence Analysis

2024-09-14T12:40:59+00:00

The similarity of a business can be a threat if not handled properly. One type of business with a fairly high level of similarity and competitors is fast food restaurants. This study compared 8 fast food restaurants that have similar products and services in order to see the level of similarity and variables that influence the fast food restaurant. There were 55 respondents who had filled out the questionnaire. Based on the results of the analysis using Multidimensional scaling, it can be seen that fast food restaurants have similarities viewed from the distance on the position map. Wendy has similarities with A&W, with a distance of 0.39, Hoka-hoka Bento has similarities with Yoshinoya with a distance of 0.535, KFC is closer to A&W, Burger King is closer to McD, Richeese with KFC, and McD is closer to A&W. Meanwhile, from the perceptual map, it can be seen the advantages of each restaurant such as McD is superior in the delivery service variable and KFC is superior in terms of price

Kajian lapis perkerasan dan kerusakan jalan pada proyek rekontruksi jalan ruas batas Provinsi Sulteng – Lamonae – Landawe

2024-09-10T09:27:21+00:00

The Central Sulawesi – Lamonae – Landawe border section is designated as a national route that links the Southeast Sulawesi region with Central Sulawesi, specifically the mining industrial district of Morowali City. This route facilitates not only community mobilization but also the transportation of heavy mining equipment. Daily, the road endures heavy vehicle traffic carrying logistics, which increases the volume and load on this route, leading to pavement layer damage and a decline in service quality. This study aims to analyze the road surface conditions and determine the appropriate handling program using the Surface Distress Index (SDI) and International Roughness Index (IRI) methods, spanning from STA 0+000 to STA 5+500 over a segment length of 5.5 km. Subsequently, it plans the pavement layer thickness design for segments with severe surface damage using the 2017 Pavement Design Manual. The study results indicate that, according to the SDI method, 47% of the road is in good condition, 24% in moderate condition, 16% in minor damage, and 13% in severe damage. According to the IRI method, 27% of the road is in good condition, 49% in moderate condition, 15% in minor damage, and 9% in severe damage. Based on SDI and IRI values, a handling program comprising routine maintenance, periodic maintenance, and reconstruction is established. The pavement layer thickness calculation, based on the 2017 Pavement Design Manual, recommends asphalt pavement with granular base layers, comprising AC WC with a thickness of 40 mm, AC BC with 60 mm, AC Base with 80 mm, and Class A Granular Base with a thickness of 300 mm, along with subgrade improvement with a planned thickness of 200 mm.

K Kajian hambatan samping terhadap kinerja ruas pada kawasan komersil (studi kasus: Jalan Boulevard kota Makassar)

2024-09-10T09:26:18+00:00

The traffic on the Makassar City Boulevard Road segment operates using a two-way system, with a significant volume of vehicles and frequent obstacles on the sides. It arises as a result of the presence of commercial zones, encompassing trade and service establishments such as offices, banks, stores, restaurants, hotels, and shopping centers, where transactions between sellers and purchasers take place. Hence, this study was carried out to investigate the influence of side barriers obstructions on the performance of the Makassar City Boulevard Road segment utilizing the MKJI 1997 methodology. The analysis reveals that the highest frequency of side barriers on the section of Jalan Boulevard Makassar City occurs on Thursdays at point 2 (in front of Jims Honey Store), with a rate of 592 pcu/h or 4.10% of the total number of side barrier events at that location, which is 14450 pcu/h. These side barriers are classified as high class (H) and are predominantly found in commercial areas with high roadside activity. Thus, it has been demonstrated that side barriers have a notable influence on the performance of the Makassar City Boulevard Road portion, leading to a fall in speed and capacity, as well as a decline in service quality standards.