| Summary: | 碩士 === 國立臺灣科技大學 === 工業管理系 === 105 === This thesis compares the performance of group and individual preventive maintenance policies for two leased devices. Failures are repaired by the lesser (the owner of the device) within the lease period and a penalty may occur to the lesser when the time required to perform a repair exceeds a tolerance limit. In order to reduce the total cost, the lesser may provide preventive maintenance service to reduce the number of failures. When the lesser provides preventive maintenance, the failure rate of the device can be reduced and it will also incur a setup cost and a maintenance cost. The failure of each device can be rectified by minimal repair and it occurs a cost of minimal repair. According to the above maintenance scheme, this thesis will construct the cost models of group and individual preventive maintenance policies. In addition, the numerical examples are given to illustrate the effect of each parameter on the optimal preventive maintenance policy.
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