Perencanaan Pembelian Bahan Baku Dengan Mempertimbangkan Biaya Inventory (Studi Kasus: PT. Kerta Rajasa Raya). (Raw Material Purchase Planning Considering Inventory Costs (Case Study: PT. Kerta Rajasa Raya)).

Sari, Ayu Widya Puspita (2025) Perencanaan Pembelian Bahan Baku Dengan Mempertimbangkan Biaya Inventory (Studi Kasus: PT. Kerta Rajasa Raya). (Raw Material Purchase Planning Considering Inventory Costs (Case Study: PT. Kerta Rajasa Raya)). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

PT. Kerta Rajasa Raya is a plastic sack manufacturing company that requires plastic pellets as raw material in its production process. So far, the company has not been optimal in planning raw material inventory, so it is necessary to pay attention to optimizing raw material inventory. Linear Programming is one method that can be used to control raw material inventory by assisting decision making in allocating various resources such as machines, labor, capital, time, capacity, and raw materials. In this study, the company purchased raw materials through two different suppliers with different capacities and unit prices. In addition, the company has a raw material warehouse capacity. The goal to be achieved in this study is to minimize the cost of purchasing raw materials. From the results of the study, the optimal amount of raw material purchases was obtained from supplier 1 with a total purchase of 1,577,852 kg and no purchases were made from supplier 2. When compared to the policies that have been implemented by the company, the use of the linear programming method in determining raw material purchases resulted in cost savings of Rp 1.624.805.32.

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