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  Measurement, Test and Calibration
  Targets for Linearity

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Author Topic:   Targets for Linearity
posted 05 September 2000 05:56 PM           Edit/Delete Message   Reply w/Quote
I am looking for some recommendations for acceptance criteria for QS-9000 linearity studies. The MSA manual does not define acceptance criteria it just says that regression line should have a good linear fit(R squared) and good linearity or low slope. The auditor says I must have values or targets stated for these characteristics. I can't find any guidelines. Any ideas?

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Marc Smith
Cheech Wizard

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From:West Chester, OH, USA

posted 10 September 2000 09:23 PM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
As I understand it, you take the value of the instrument's range deviation and look at it as a % of the spec range. Was this brought up with respect to your uncertainty budget?

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posted 18 September 2000 12:53 PM     Click Here to See the Profile for e.s.deo   Click Here to Email e.s.deo     Edit/Delete Message   Reply w/Quote
Dear Bharder,

You hv to consider linearity as a proportion of the total r&r
As well as total tolerance.
We should not consider this in isolation!
If further details are provided we can better discuss this!


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