IJSRP, Volume 4, Issue 6, June 2014 Edition [ISSN 2250-3153]
V.N. Rama Devi, Dr. K. Chandan
This paper deals with the optimal control policy of two-phase service MX/ Ek /1 queues with vacation, N-policy, server break downs and balking. Generating functions method is used to derive the system characteristics. The total expected cost function is developed to determine the optimal threshold of N at a minimum cost. Numerical experiment is performed to validate the analytical results. The sensitivity analysis has been carried out to examine the effect of different parameters in the system.