Research on Replacement Model for Regular Overhauling Repairable System

To study a deteriorative repairable system with regular overhauling,a kind of new maintenance and replacement model is proposed.Assume that the overhauling time is increasing in neighboring cycle,the random overhauling is"as good as old"and the repair after the system failure is not"as good as new",we consider the replacement policy N based on the failure number,the mathematic model has been established by using renewal process theory and the monotone geometric process theory,the explicit expressions of the long—run expected profit per unit time is derived.Finally,we discuss the result and a numerical example is given to validate the effectiveness of the method.