Purwojatmiko, B. Handoko, and Laksmi Ambarwati. “Implementation of DMAIC for Production Quality Control: Case Study of Power Supply Production in Indonesia”. Jurnal Teknik 21, no. 2 (December 31, 2023): 228-238. Accessed December 21, 2024. https://jt.ft.ung.ac.id/index.php/jt/article/view/342.