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Author Topic:   Evaluation
Lurker (<10 Posts)

Posts: 8
Registered: Aug 2000

posted 11 December 2000 06:21 AM     Click Here to See the Profile for Niko   Click Here to Email Niko     Edit/Delete Message   Reply w/Quote
Background info
We manufacture springs. Common devices used in measuring the springs are: Caliper, and device for measuring force.

Two questions.
1. Do we have to performe MSA on every specification even if it is not a special characteristic?

2. Which value do we send to customer. R&R on process variation or tolerance variation?

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Al Dyer
Forum Wizard

Posts: 622
From:Lapeer, MI USA
Registered: Oct 2000

posted 11 December 2000 06:23 PM     Click Here to See the Profile for Al Dyer   Click Here to Email Al Dyer     Edit/Delete Message   Reply w/Quote
Do you supply the automotive industry?

If so,

A: Each type of gage must go through an MSA (Bias, Linearity if applicable, and ongoing stability) study per AIAG MSA manual. This does not mean that each product specification needs to be assessed.

B: We have always used the long form R&R format in the AIAG MSA manual. This takes into account both equipment and operator (appraiser) error. Our R&R studies always include at least 2 operators and 1 quality technician.

As usual, your customer may request you to submit different, or additional, data based on their own criteria.

This is a very short answer and there are many more experienced members of this forum that can address this subject.


Al Dyer
Mngt. Rep.

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