Abstract
The conditions of the monotonic dependence between the stationary characteristics (the request loss probability, the average queue length, and the average time of request waiting in queue in the M/M/1/r queueing system (QS) and the average time of request waiting in queue in the other systems) and the system parameters (the buffer capacity, the loading coefficient of the system, the number of servers, and the threshold level of switching of servicing modes) have been determined in the M/M/1/r and M/M/n QSs, the M/M/1 QS with threshold switching of servicing modes at the instant of a change in the number of requests, and the M/M/1/ QS with threshold blocking of a request flow. The monotonicity properties of characteristics are employed to solve the optimal synthesis problems of systems with specified stationary characteristics. The calculated data have been verified via simulation models constructed in the GPSS World software environ� ment. DOI: 10.1134/S1064226911120266
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