A Queueing Network Analyzer for Manufacturing
نویسندگان
چکیده
We describe a new version of the Queueing Network Analyzer (QNA) software package that was developed especially to analyze manufacturing lines. The goal was to obtain a convenient tool for estimating capacity, work-in-process inventory and production intervals, as needed to design or change a manufacturing line. QNA is an analytic tool, based on mathematical formulas rather than simulation, and simple approximations rather than involved numerical procedures, so that it can produce results for relatively large and complex models quickly and inexpensively. In particular, QNA employs the parametric-decomposition approximation method, which has its roots . in teletraffic theory. To meet needs in the manufacturing environment, QNA has been modified to represent machine breakdown, batch service, changing lot sizes and product testing with associated repair and partial yields. QNA also has a new menu-driven screen-oriented interface using manufacturing terminology.
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