Saputra, Ardian, and Erwen Martianis. “Preventive Analysis of Maintenance On Centrifugal Pumps Using The Mean Method Time Between Failure (MTBF) and Mean Time To Repair (MTTR)”. International Journal of Science and Environment (IJSE) 6, no. 2 (July 31, 2026): 2450–2456. Accessed August 7, 2026. https://ijsenet.com/index.php/IJSE/article/view/770.