Abstract:

The periodic preventive maintenance policy for a deteriorating repairable system is studied. Preventive maintenance actions restore the system to a condition between as good as new and as bad as immediately before the maintenance action. The breakdown process during the preventive maintenance actions is supposed to follow a nonhomogeneous Poisson process. The proportional age setback model is used to measure the quality of the maintenance actions. The expressions for the optimal preventive maintenance period T and the count of preventive actions N are derived. Conditions are given under which a unique optimal policy exists. A practical algorithm is proposed to get the optimal (N,T) policy. Numerical examples validate the algorithm.