Long Run Availability of a Two Unit Cold Standby Repairable System Subject to Two Types of Critical Errors

Abstract

In this paper deals a cold stand by system composed of two identical units S₀ (main operating unit) and S_- (standby unit) which is taken into function through a switching mechanism which is not hundred percent reliable. It is obvious that the stand by unit is switched to operate when the operating unit fails and the switching device which is used to put the standby unit into operation may be perfect or imperfect at the time of need operating unit may fail either due to normal or chance so we evaluated various important measures of system effectiveness and reliability parameters.