Ramadhan, Irvan, and Risma Fitriani. “Optimalisasi Efektivitas Preventive Maintenance Berbasis Usage-Based Maintenance Untuk Mengurangi Downtime Di PT PQR”. Journal of Integrated System 7, no. 2 (January 1, 2025): 166–183. Accessed January 15, 2025. http://114.7.153.31/index.php/jis/article/view/9760.