Abstract
We study a GI/M/1 queue wiih phase-type (PH) setup times or vacations. In this queueing system, the service facility is shut down or is switched to do other jobs (taking vacations) whenever the system becomes empty. When the next customer arrives at the system to initiate another busy period, there is a setup time for the server or there is a residual vacation time. The setup time or the vacation is a PH distributed random variable. Using the matrix analytic method, we obtain explicit expressions for the stationary distributions of queue length and waiting lime and prove stochastic decomposition properties of the queue length and waiting time in this system. The model can be used to model a production and inventory control system.
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