Apandi, Aizat Haikal, Adam Sharrif, and Kamarulzaman Mahmad Khairai. “Product Quality Output Measurement for Preventive Maintenance on Computer Numerical Control (CNC) Machines at an Electronic Manufacturing Industry”. Qomaruna: Journal of Multidisciplinary Studies 2, no. 1 (December 31, 2024): 1–19. Accessed October 26, 2025. http://jurnal.uqgresik.ac.id/index.php/qjms/article/view/56.