The Compound Maintenance Cost Model for Key Equipment with Imperfect Inspection

Based on the theory of delay time, a compound maintenance strategy, that was block replacement with on-condition tasks, was introduced for keyequipment. The maintenance cost was analyzed, and its mathematical model in the situation of imperfect inspection was established, which took the number and interval of on-condition tasks as variables. On the basis of above research, a numerical example was also given to illustrate the model's application, and the result verified its effectiveness in reducing maintenance cost. KEYWORD: Compound maintenance; Cost Model; Imperfect inspection