Standby System with Imperfect Coverage and Repairable Service Station

Abstract

This paper analyzes the reliability characteristics of a system with imperfect coverage in which a repairable service station is considered. Failure times of primary and standby units are assumed to follow exponential distributions. With a coverage probability c , a failed unit is immediately detected and replaced by a standby if one is available. If the failed unit is not detected, the system enters an unsafe failure state and has to be refreshed by a reboot action. When the service station breaks down, it needs repair at a repair device. We present the expression for reliability function R Y ( t ) and mean time to system failure MTTF . Several cases are analyzed to study the effects of various parameters on the system reliability R Y ( t ) and MTTF . We also perform the sensitivity analysis of R Y ( t ) and MTTF with respect to system parameters. Finally, we present an application example to demonstrate the applicability of investigated model.