Maryani, Edna, Humiras Hardi Purba, and Sunadi Sunadi. “Process Capability Improvement Through DMAIC Method for Aluminium Alloy Wheels Casting”. Journal of Industrial Engineering & Management Research 1, no. 4 (November 23, 2020): 19-26. Accessed January 9, 2025. https://mail.jiemar.org/index.php/jiemar/article/view/98.