Abstract
We consider a tandem queueing system with Markovian Arrival Process (MAP) as a model of remote technical support. The first stage is a multi-server queueing system with a finite buffer and impatient customers. After the service at the first stage the customer leaves the system or moves to the second stage. The second stage has a finite number of servers and an infinite buffer. The service time at the first and second stages has an exponential distribution with different parameters. The ergodicity condition is derived. A numerically stable algorithm for calculation of the stationary distribution of the system under consideration is presented. The main performance measures are calculated. The Laplace-Stieltjes transforms of the sojourn time distribution at the both stages are derived.
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