Ramadhan, M. A. Z., and T. Sukmono. “Determination of Preventive Maintenance Time Intervals on Nail Making Machines Using Reliability Centered Maintenance (RCM) II . Method”. PROZIMA (Productivity, Optimization and Manufacturing System Engineering), Vol. 2, no. 2, Dec. 2018, pp. 49-57, doi:10.21070/prozima.v2i2.1349.