Abstract
Patel [16] proposed a probabilistic approach to analyze the performance of synchronous multistage interconnection networks (MIN's) based on a uniform reference model and the assumption of independent requests, Patel's model and analytical results have been widely adopted by numerous researchers as a basis to investigate various aspects of MIN's. In this paper we study in detail the effects of the independence assumption on the accuracy of system performance and point out the factors which cause inaccuracy, A ne-cv queueing model is then proposed and is shown to be very accurate. Since only six states are needed, independent of the size of MIN's, this new model is very efficient computationally.