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All Journal Jurnal Teknik Industri Terintegrasi (JUTIN)
Rizky Akbar Saputra
Universitas 17 Agustus 1945 Surabaya
Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Pengendalian Persediaan Bahan Baku Kedelai untuk Meminimalkan Biaya Persediaan Rizky Akbar Saputra; Herlina Herlina
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.60795

Abstract

Mr. Teguh’s Tofu Factory, established in 2003, is an example of a home-based industry that employs a make-to-stock production system. The reactive, non-scientifically based system for controlling raw material inventory resulted in stockouts and overstock during the January–December 2025 period. This study aims to determine the safety stock, reorder point, and optimal order quantity using the Silver Meal (SM) method. Demand forecasting was performed using the Weighted Moving Average. The results show that the Silver Meal method yields a safety stock of 663 kg and a reorder point of 4,836 kg. The application of this method resulted in a 75% reduction in ordering costs (from Rp1,027,200 to Rp256,800) and a 100% reduction in storage costs (from Rp270,675 to Rp0), or a non-material operational cost savings of 80.21%, thereby reducing the Total Inventory Cost (TIC) from Rp1,862,297,875 to Rp1,853,286,800. This study demonstrates that the integration of the WMA and Silver Meal forecasting methods can be an effective solution for optimizing soybean raw material inventory policies in the home-based tofu industry
Co-Authors Herlina Herlina