Availability for 2/n: F and secondary subsystems with general repair-time distributions and shut-off rules

The model which main 2/n: F and secondary subsystems subject to shut-off rules is considered. In this model, the system has single repair facility. The repair discipline that the main subsystem has the preemptive repeat priority is considered. Constant failure rate and general repair-time distribution are assumed. The system availability is obtained by using linear ordinary differential equation method and supplymentary variable technique.