Wright Williams & Kelly
Factory Explorer® v2.4
Capacity Analysis for
Adjustable Summary: When performing capacity analysis for products with adjustable transform/assembly percentages, if the original model specifies a transform or assembly percentage of zero, the capacity analysis engine will be unable to properly adjust the percentages to meet endproduct demand. To avoid this problem, specify nonzero transform and assembly percentages for products that have adjustable transform/assembly percentages (these percentages will be recalculated anyway by the capacity analysis in order to meet demand). Also, specifying a throughput rate of zero for an endproduct downstream from a product with adjustable transform/assembly percentages can cause the capacity analysis engine to halt with an internal error. To avoid this problem, specify small but nonzero throughput rates for endproducts downstream from products with adjustable transform/assembly percentages. These problems are fixed in Factory Explorer® v2.5 beta 2. Details: When performing capacity analysis for models with adjustable transform/assembly percentages, Factory Explorer® first does a regular capacity analysis on the model. It then backcalculates based on demand (required throughput rates) to calculate the appropriate transform/assembly percentages necessary to match demand. Then it repeats the capacity analysis calculations with the adjusted transform/assembly percentages. There were two problems in these process. First, if the original model specified a transform or assembly percentage of zero, the backcalculation would be unable to correctly calculate the proper transform/assembly percentage necessary to match demand, since there would be no flow at all down that particular product path in the initial capacity calculations. Second, if an endproduct downstream from a product with adjustable transform/assembly percentages specified a demand of zero, a similar problem would occur, because this zero demand would backpropagate to the point where the adjustable percentages occurred, at which time a zero over zero term entered the calculation, causing the capacity analysis to halt with an internal error. Workaround: To avoid the first problem, specify nonzero transform and assembly percentages for products that have adjustable transform/assembly percentages (these percentages will be recalculated anyway by the capacity analysis in order to meet demand). To avoid the second, specify small but nonzero throughput rates for endproducts downstream from products with adjustable transform/assembly percentages. Techalert tafx199808

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