Kholil, Muhammad, Syarif Hidayat, and Alfa Firdaus. “Improving Surface Finish Quality of Plastic Molds via VSM and DMAIC Integration”. Journal of Information System, Technology and Engineering 3, no. 3 (September 30, 2025): 536–543. Accessed October 22, 2026. https://www.gemapublisher.com/jiste/article/view/187.