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Discussion Thread Title: Cpk Formula seems off, need help!?
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Old 25th July 2017, 02:20 PM

Total Posts: 4
Re: CPK formula seems off, need help!?

OK, so I shifted all of them between .279 to .281 and now my CPK is 2.429 and CP 2.608 as you said it would.

I suppose I am confused on how this works and had some misconceptions. For instance I assumed as long as your in tolerance you would have a higher CPK.

Which leads me to guess in order to get a good Cpk you need to have the part dimensions balanced out (like a see-saw)? Although the farther they are spread, the lower Cpk you end up with correct?

SO... was the first number I came up right, considering they were tilted all one way?

One thing I noticed is I have one Cpk coming in around 5.578. I suppose it's right but that leads me to wonder how high a Cpk can go up? (too lazy to change all my numbers dead on to see).

I really appreciate the help, it makes a lot of sense now. I finally feel I can move forward with some confidence.

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