Process Capability CP, CPK, PP, PPK

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In that video, I explained the Process and Performance Capability indices with a working example of a Process Manufacturing system
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Good presentation... I have a doubt suppose our data doesn't follow normal distribution...still cp and cpk reliable?

jitendranath
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These rules are only valid for normal distributions. Using them for no normal distributions will create high errors,
We usually consider by nature the data distribution of a process a normal distribution unless there is an assignable cause causing a high variation in the process.

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