Phase-type arrivals and impatient customers in multiserver queue with multiple working vacations

Goswami, C. and Selveraju, N. (2016) Phase-type arrivals and impatient customers in multiserver queue with multiple working vacations. Advances in Operations Research, 2016, 4024950. (doi: 10.1155/2016/4024950)

Abstract

We consider a PH/M/c queue with multiple working vacations where the customers waiting in queue for service are impatient. The working vacation policy is the one in which the servers serve at a lower rate during the vacation period rather than completely ceasing the service. Customer’s impatience is due to its arrival during the period where all the servers are in working vacations and the arriving customer has to join the queue. We formulate the system as a nonhomogeneous quasi-birth-death process and use finite truncation method to find the stationary probability vector. Various performance measures like the average number of busy servers in the system during a vacation as well as during a nonvacation period, server availability, blocking probability, and average number of lost customers are given. Numerical examples are provided to illustrate the effects of various parameters and interarrival distributions on system performance.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Goswami, Dr Cosmika
• Authors: Goswami, C., and Selveraju, N.
• College/School: College of Medical Veterinary and Life Sciences > School of Infection & Immunity
• Journal Name: Advances in Operations Research
• Publisher: Hindawi
• ISSN: 1687-9147
• ISSN (Online): 1687-9155
• Copyright Holders: Copyright © 2016 Cosmika Goswami and N. Selvaraju
• First Published: First published in Advances in Operations Research 2016: 4024950
• Publisher Policy: Reproduced under a Creative Commons License