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An Analysis of Two-State Retrial Queueing Model with Feedback having Impatient Customers

Neelam Singla , Harwinder Kaur


Present paper considers a two dimensional retrial queueing model with feedback having impatient customers. If the server is idle on customer’s arrival it is served immediately else it may balk because of impatience. If the server is busy the customer joins the orbit and retries for service until it finds server idle or may renege from the orbit. After service the unsatistified customer may join the orbit as a feedback customer. The primary as well as secondary calls follow Poisson process. Service times follow Exponential distribution. The transient probabilities for exact number of arrivals and departures when the server is idle or busy are obtained. Some performance measures, numerical and graphical solutions are also computed


queueing, retrial, feedback, impatience.

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