This paper analysis a stochastic system with two different types of maintenance policies for the standby unit before getting it into operation. In Model1, the standby unit undergoes for maintenance with some probability when it is not operable at the failure of operative unit. While in Model2, server first inspects the standby unit to see the feasibility of its operation at the failure of operating unit. And, if standby unit is not found fit for operation, then the server starts its maintenance immediately. A single server is available instantly to provide the services like repairs of hardware, software components and preventive maintenance. The system works as new after repair. All the key reliability characteristics and other parameters of the system like mean time to system failure(MTSF), availability of the system, busy period of the server, the number of visits of the server and cost-benefit of the system are derived by RPGT.

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Keywords: Base –State, Capacity Factor, Fuzziness Measure, RPGT.