Fahruddin, A’rasy, and Moh. Faisal Araffi. “Leveraging Six Sigma for Enhanced Reliability in Heavy Equipment Operations: Memanfaatkan Six Sigma Untuk Meningkatkan Keandalan Dalam Operasi Alat Berat”. Procedia of Engineering and Life Science 5 (March 18, 2024): 600–604. Accessed July 3, 2025. https://pels.umsida.ac.id/index.php/PELS/article/view/1543.