Repair Limit Suspension Policies for a 2-Unit Redundant System with 2-Phase Repairs

This paper considers a repair limit suspension model for a 2-unit standby redundant system with 2-phase repair. A failed unit is first repaired by a phase 1 repair. If the repair is not completed up to the fixed repair-limit time then the unit goes for a phase-2 repair. A phase-2 repair of both failed units is done simultaneously. We first derive various reliability measures by a Markov renewal process and then discuss the optimum repair-limit suspension policies maximizing the availability. Numerical examples are presented.