Estimation of Survival Time of Patients Suffering from Liver Cirrhosis Based on Preventive Maintenance Policy (PMP)

Maintenance policy is a set of predetermine activities including preventive and corrective maintenance. Every system may be human or industrial experience deterioration. After a finite time of deterioration the system will go to breakdown status if there are no activities to maintain it. In order to illustrate this application on human system, we have developed two models for estimating survival time of the patients suffering from liver cirrhosis who are subjected to stochastic deterioration. First model based on number of transitions patient has made to reach death state and another employing preventive maintenance policy (PMP).