Poisson 수요과정을 갖는 두 품목 콘윕시스템의 성능평가

초록

In this study we consider a flow line conwip system in which two types of products are produced. The processing times of each product type at each station follow an independent exponential distribution and the demands for the finished products of each type arrive according to a Poisson process. The demands that are not satisfied instantaneously are assumed to be backordered. For this system we develop an approximation method to obtain the performance measures such as steady state probabilities of the number of parts of each product type at each station, system throughput, and the proportion of backordered demands. For the analysis of the proposed conwip system, we model the conwip system as a two-class closed queueing network with a synchronization station and analyze the two-class closed queueing network using a product-form approximation method developed by Baynat and Dallery. In the approximation method, each subsystem is analyzed using a matrix geometric method. Comparisons with simulation show that the approximation method provides fairly accurate results for all performance measures.