B. Kiliroong, Sebastianus, Melia Eka Lestiani, and Maniah Maniah. “Optimizing Spare Parts Safety Stock: Integrating Demand Variability and Operational Criticality in Smelting Operation”. Reslaj: Religion Education Social Laa Roiba Journal 8, no. 11 (November 5, 2026): 993 –. Accessed November 5, 2026. https://journal-laaroiba.com/ojs/index.php/reslaj/article/view/13489.