The purpose of this study was to increase the quality of product by focusing on the machine efficiency improvement. The principle\nof the reliability centeredmaintenance (RCM) was applied to increase themachine reliability.The objective was to create preventive\nmaintenance plan under reliability centeredmaintenance method and to reduce defects. The study target was set to reduce the Lead\nPPM for a test machine by simulating the proposed preventive maintenance plan.The simulation optimization approach based on\nevolutionary algorithms was employed for the preventive maintenance technique selection process to select the PM interval that\ngave the best total cost and Lead PPM values. The research methodology includes procedures such as following the priority of\ncritical components in test machine, analyzing the damage and risk level by using Failure Mode and Effects Analysis (FMEA),\ncalculating the suitable replacement period through reliability estimation, and optimizing the preventive maintenance plan. From\nthe result of the study it is shown that the Lead PPM of test machine can be reduced. The cost of preventive maintenance, cost of\ngood product, and cost of lost product were decreased.
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