## Analysis of batch arrival queue with two stages of service and phase vactions.(English)Zbl 1311.60107

Summary: We study a batch arrival queueing system of phase vacation with two stages of service based on a Bernoulli schedule. A single server provides essential service to all arriving customers with service time following a general distribution. After two stages of service completion, the server leaves for phase one vacation of random length with probability $$p$$ or continues to stay in the system with probability $$1-p$$. As soon as the completion of phase one vacation, the server undergoes phase two vacation. On completion of two heterogeneous phases of vacation the server returns back to the system. The vacation times are assumed to be general. The server is interrupted and the service interruption follows an exponential distribution. The arrivals follow a Poisson distribution. Using a supplementary variable technique, the Laplace transforms of the time-dependent probabilities of the system state are derived. From this we deduce the steady state results. We also obtain the average queue size and average waiting time.

### MSC:

 60K25 Queueing theory (aspects of probability theory) 60K30 Applications of queueing theory (congestion, allocation, storage, traffic, etc.) 90B22 Queues and service in operations research
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### References:

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