TRANSIENT ANALYSIS OF N-POLICY QUEUE WITH SYSTEM DISASTER REPAIR PREVENTIVE MAINTENANCE RE-SERVICE BALKING CLOSEDOWN AND SETUP TIMES

Abstract

This paper investigates the transient behavior of a M/M/1 queue- ing model with N-policy, system disaster, repair, preventive maintenance, balk-ing, re-service, closedown and setup times. The server stays dormant (off state) until N customers accumulate in the queue and then starts an exhaustive ser-vice (on state). After the service, each customer may either leave the system or get immediate re-service. When the system becomes empty, the server re-sumes closedown work and then undergoes preventive maintenance. After that, it comes to the idle state and waits N accumulate for service. When the Nthone enters the queue, the server commences the setup work and then starts the service. Meanwhile, the system suffers disastrous breakdown during busy period. It forced the system to the failure state and all the customers get elim-inated. After that, the server gets repaired and moves to the idle state. The customers may either join the queue or balk when the size of the system is less than N. The probabilities of the proposed model are derived by the method of generating function for the transient case. Some system performance indices and numerical simulations are also presented.