Estiasih, Soffia Pudji, Bambang Sutejo, and Wing Hendroprasetyo Akbar Putra. “Lean Manufacturing System Optimization With Simulation Models and Response Surface Methodology”. International Journal of Social Sciences and Humanities Invention 5, no. 12 (December 30, 2018): 5202–5206. Accessed May 2, 2024. http://valleyinternational.net/index.php/theijsshi/article/view/1732.