The process capability index is defined as C_p = (USL

Name: The process capability index is defined as C p = (USL - LSL)/ 6,where USL and LSL are the upper and lower specification limits.
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Question

The process capability index is defined as C_p = (USL - LSL)/ 6,where USL and LSL are the upper and lower specification limits.

Quizplus · Accepted Answer

The correct formula for the process capability index C_p is (USL - LSL) / (6 * σ), where σ is the standard deviation of the process, not "6" as stated.

The Process Capability Index Is Defined as Cp = (USL