Redundant Systems with Repairable and Non-Repairable Failures

This paper studies two non-identical operative units and one cold standby unit with repairable and non-repairable failures. The system has one repairman for repair and replacement moreover; the system has some repairable failures states and some non-repairable failures states. In the case of the emergence of repairable failures states, the system will be repaired. When one non-repairable failure state appears, the system would never operate again. Thus, many classical reliability indices may become meaningless. For example, the steady state availability and failure frequency would become zero. We derive some new reliability indices of the system with repairable and non-repairable failures.