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2 January, 02:14

A metal fabricator produces connecting rods with an outer diameter that has a 1±0.01 inch specification. A machine operator takes several sample measurements over time and determines the sample mean outer diameter to be 1.002 inches with a standard deviation of 0.0025 inch. Is this process capable?

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  1. 2 January, 05:55
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    the process capability index is 0.002 and Since the capability index is < 1, therefore the process is not capable of producing the desired result.

    Explanation:

    Formula to calculate process capability index is given below-

    ... (1)

    Here

    Mean () = 1.002

    Lower specification limit (LSL) =

    Upper specification limit (USL) =

    Standard deviation () = 1.002 inch
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