Process Capability and Gage R&R relationship


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That depends. From a practical perspective, when you have that high of a Cpk, your measurement device's %Tolerance has to be acceptable. However, that doesn't mean that the %Study Variation is acceptable. Also, you may be required to complete a gage R&R by your customer, particularly if you are in automotive.


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Start by looking at your gauge calibration results, then perform a gauge MSA. These will help determine if your CpK is telling the whole story...
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