A
komlossy said:
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This is clear to me. But what if we have no tolerance range, because there is only one tolerance limit? Maybe I go and check the SPC topics, they should face the same problem when calculating CPK...
This is clear to me. But what if we have no tolerance range, because there is only one tolerance limit? Maybe I go and check the SPC topics, they should face the same problem when calculating CPK...
The other view is that you can calculate the value of tolerance from process mean to the available specification and use the constant 3 instead of 6 (or 2.575 if you are using the 'traditional' 5.15 to represent the full spread of error)
Comments anyone?