In this paper the problem of preventive maintenance (PM) planning for a system with deteriorating components has been addressed. The problem involves a multi-component system with resource constraint and minimum availability requirements. The cost function is weighted summation of repair costs, system downtime cost and random failure cost. Maintenance and repair activities are divided into three actions; namely simple service (inspection), repair and replacement. During the planning horizon, inspections are performed on the regular basis. In each inspection period, one of the three PM activities is carried for each component. The objective is to maintain certain level of availability with minimal total cost. Since the problem is complicated in nature, Simulated Annealing (SA) algorithm is employed as the solution procedure. Computational results show that this algorithm has good performance in solving PM scheduling problems.

Keywords