Muhammad Ryan Permana, Indrawansyah, and Humiras Hardi Purba. “Quality Control Analysis of Belt Conveyor With Statistical Process Control Approach: A Case Study in Fabrication Manufacturing Industry”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE 4, no. 8 (August 5, 2018): 19–28. Accessed July 3, 2024. https://ijasre.net/index.php/ijasre/article/view/553.