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We are high precision machining. Very accurate, usually small, low mass. Capability per feature on those parts we have done studies is very high; 2.0 and better. Item in question is low sophistication. Simple geometry, managable size. We just don't study these.
We feel comfortable with our study method. We may not be the best at statistical studies but we make a damn good part.
Our issue is HOW do we select and justify our sample size. Customer is expecting a calcualtion and reasoning. We need to reference some (any) industry standard or practice. A white paper or 6 sigma techique would suffice. But our contact is pushing for detail. This customer is isnsiting on approval of content pre-PPAP.
We feel comfortable with our study method. We may not be the best at statistical studies but we make a damn good part.
Our issue is HOW do we select and justify our sample size. Customer is expecting a calcualtion and reasoning. We need to reference some (any) industry standard or practice. A white paper or 6 sigma techique would suffice. But our contact is pushing for detail. This customer is isnsiting on approval of content pre-PPAP.