Hamzah, Naufal, Dini Retnowati, and Dony Perdana. “Application of Six Sigma for Quality Optimization in Textile Raw Material: A Case Study on TRC 1 Yarn”. Heuristic 22, no. 1 (May 13, 2025): 55 - 70. Accessed May 17, 2025. https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/13121.