Chin J, Manurung H, Kusumah LH, ‎ H. Combining Lean Service and DMAIC Stage to Reduce the Lead Time for the Procurement of Critical Care Products. KSS [Internet]. 2024 Aug. 15 [cited 2025 Feb. 6];9(24):610–620. Available from: http://thrillriftranks.com/index.php/KnE-Social/article/view/16885