The Commercial Factor

An additional parameter introduced into the CMC equation, the commercial factor, is a number that changes not the shape of the tolerance solid but the volume of the tolerance solid. The need for this arose because of the definition of acceptable tolerance limit. It was desired to have an equation in which the tolerance limit would always occur at the value 1.0. Thus, values below 1.0 would be identified as acceptable and values above 1.0 would be identified as unacceptable, or pass and fail, respectively. But the requirements of automotive interior plastics or computer cabinet panels are much more critical than those of toys or single-use pro-... 

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