Kumar, Narender, and Raj Kumar. “Enhance Operational Efficiency of Manufacturing Process Using Six Sigma in Small Scale Manufacturing Industry: DMAIC Approach”. International Journal of Advanced Science Computing and Engineering 6, no. 3 (December 31, 2024): 113–117. Accessed August 3, 2025. https://www.ijasce.org/index.php/IJASCE/article/view/192.