Analyzing simple birth – death markov queuing systems with interval parameters

Arrival rate and service rate in queuing systems are acquired from statistical information. Although, these parameters are determined, they are imprecise. Also these parameters change with time. A suitable way for studying these states is consider them as interval numbers. In this paper, we introduce simple birth – death markov queuing systems with interval parameters and specially discuss the queuing systems M/M/1/∞ and M/M/1/K when arrival rate and service rate are interval and is determined the performance measures as interval