The reported Cpk for a process with an average of 104 units, a spread of 18 units and upper and lower specification limits of 122 and 96 units would be?
If I recall correctly, Cpk is the minimum of the two calculations for the upper and lower limits, but I can't remember the exact values we need to plug in.
Ugh, I hate these process capability questions. There are so many formulas to remember. Let me see if I can walk through this slowly and not overthink it.
This looks straightforward. The Cpk formula is (USL - LSL) / (6 * sigma), and the question provides all the necessary values. I think I can work this out.
Hmm, I'm a bit unsure about this one. The process average and spread are given, but I'm not sure how to use that to calculate Cpk. I'll have to review the Cpk formula again.
Ellen
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