Fitri Ikatrinasari, Zulfa, and Dan Kosasih. “Improving Quality Control Process Through Value Stream Mapping”. International Journal of Engineering and Technology 7, no. 2.29 (May 22, 2018): 219–225. Accessed April 6, 2025. https://sciencepubco.com/index.php/IJET/article/view/13321.