In this Paper, two system models are analyzed. The system have too dissimilar components working independently in parallel. In order to prolong the system operation preventive maintenance (inspection, minor repair) is provided in system at random epochs of time. There are two repair facilities to repair the components. Failure of one component changes the life time parameter of the other component. The failure times of the components are assumed to be exponentially distributed.
Reliability, Exponential distribution, Mean time to system Failure
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