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SteveL
Firstly, apologies if this is the wrong forum but I couldn't find one related specifically to Inspection.
To my main point. As a Quality Engineering Dept have been tasked with devising a methodology for determining Inspection Frequencies of parts we measure on our CMM's. This is proving very difficult to acheive scientifically.
We clearly want to relate inspection frequencies to process performance and therefore we've initally used both Cpk outputs and Est Reject % as our 'drivers' ie Cpk < 1.00 measure 1 in 1
The problem we have is whether or not this rationale is valid and if so is there a recognised scale with which to adopt this approach to
ie Cpk <1.00 = measure 1 in 1, Cpk 1.00 - 1.33 = measure 1 in 2, Cpk 1.33 - 1.67 = measure 1 in 5, etc.
Thanking you in advance for your input.
Steve
To my main point. As a Quality Engineering Dept have been tasked with devising a methodology for determining Inspection Frequencies of parts we measure on our CMM's. This is proving very difficult to acheive scientifically.
We clearly want to relate inspection frequencies to process performance and therefore we've initally used both Cpk outputs and Est Reject % as our 'drivers' ie Cpk < 1.00 measure 1 in 1
The problem we have is whether or not this rationale is valid and if so is there a recognised scale with which to adopt this approach to
ie Cpk <1.00 = measure 1 in 1, Cpk 1.00 - 1.33 = measure 1 in 2, Cpk 1.33 - 1.67 = measure 1 in 5, etc.
Thanking you in advance for your input.
Steve