PROBLEM TO BE SOLVED: To provide a method for reducing quality risk, which is simple, reliable, and rational in a raw material industry.;SOLUTION: A method for reducing quality risk, which is simple, reliable, and rational, is found by sequentially performing a deep layer factor investigation based on a simulation schematic diagram method and a unique evaluation method focusing prevention of occurrence of quality complaint (or quality incompatibility) for the investigated factor. Thereby, it is expected that product quality risk is reduced simply, reliably, and rationally in a raw material industry in comparison with a conventional method.;COPYRIGHT: (C)2014,JPO&INPIT
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