Ariffien, Afferdhy, and Deby Rosminingsih. “Lean Manufacturing Approach to Minimize Waste Production Parts STN Wfx000 RIB at the Prismatic Medium Machine 2 in PT X”. International Review of Management and Marketing, vol. 6, no. 8S, Oct. 2017, pp. 310-4, https://econjournals.com/index.php/irmm/article/view/5680.