LUMBANTORUAN, R. R.; HUTAHAEAN, J.; PARINI, P. Konsep Lean Supply Chain dalam Meningkatkan Efisiensi Operasional: The Lean Supply Chain Concept in Improving Operational Efficiency. MALCOM: Indonesian Journal of Machine Learning and Computer Science, v. 6, n. 2, p. 944-951, 1 May 2026.