Inspection Threshold for Multistate System

Determination of inspection period for a multistate system with imperfect inspection is an important issue for maintenance management. The result of imperfect inspection has potential to lead wrong information. This wrong information can cause bad decisions. How to eliminate the imperfect inspections is an important problem. This paper considers an inspection threshold which eliminates unnecessary imperfect inspection for the multistate system. In particular, it is intended for a system in which the number of unit failures is defined as the system state.