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

Mela Meilani; Muhammad Nashir  Ardiansyah; Prafajar Suksessanno  Muttaqin

doi:10.31004/jutin.v7i4.33537

Authors

Mela Meilani Program Studi Teknik Industri, Fakultas Rekayasa Industri, Universitas Telkom
Muhammad Nashir Ardiansyah Program Studi Teknik Industri, Fakultas Rekayasa Industri, Universitas Telkom
Prafajar Suksessanno Muttaqin Program Studi Teknik Logistik, Fakultas Rekayasa Industri, Universitas Telkom

DOI:

https://doi.org/10.31004/jutin.v7i4.33537

Keywords:

Overstock, Overstock; Material Inventory; Newsvendor Model; ABC Analysis

Abstract

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%.

References

Bahagia, S. N. (2006). Sistem Inventori. Penerbit ITB.

Simbolon, L. D. (2021). Pengendalian Persediaan. Praya NTB: Forum Pemuda Aswaja.

Tang, Shaolong., dkk (2018). The newsvendor model revisited the impacts of high unit holding costs on the accuracy of the classic model. Frontiers of Business Research in China.

Sumargo,S., & Damayanti, Dida D. (2023). Implementasi Model Newsvendor Dengan Kapasitas Reaktif di PT.XYZ. Management Systems & Industrial Engineering Journal Vol. 06 No. 02.

Sintia, I. dkk. (2022). Perbandingan Tingkat Konsistensi Uji Distribusi Normalitas Pada Kasus Tingkat Pengangguran di Jawa. Prosiding Seminar Nasional Matematika, Statistika, dan Aplikasinya.

Wiston, Wayne L. (2003). Operations Research: Applications And Algorithms (4th ed). Indiana University

Cachon, G., & Terwiesch, C. (2018). Matching Supply with Demand: An Introduction to Operations Management (4th ed). New York: McGraw-Hill Companies, Inc.