This paper discusses reliability and sensitivity analysis of a repairable system with warmstandbys and imperfect coverage. Breakdown times of primary and standby units are assumed to have exponential distribution, and repair times of the broken-down units are also assumed to have exponential distribution. The system fails when the number of primary units is less than K or any one of the broken-down units is not covered. We study the impact of the coverage factor c and other system parameters on the reliability function, the mean and the variance of time to system failure.
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