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  Measurement, Test and Calibration
  Poor MSA for DOE - explain effect

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Author Topic:   Poor MSA for DOE - explain effect
L.G.
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posted 13 March 2001 02:08 PM           Edit/Delete Message   Reply w/Quote
I find myself in the possition of having to explain how having a 67% of study error in a measurement system (AIAG MSA method - variable data) errodes the confidence in DOE results relying on this system. Can anyone suggest how to prove the negative effects of using this poor system for DOE analysis? Those I need to convince don't seen to think there is too much wrong with this! They feel that the DOE is used to show relative differences between parameter settings, thus the %error is not that important! I've told them that with this much error, you have little confidence about the relative differences you've calculated. Please help me prove it!

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Marc Smith
Cheech Wizard

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From:West Chester, OH, USA
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posted 22 March 2001 10:08 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
Any DOE / MSA experts out there?

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Geoff Cotton
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Posts: 34
From:Staffordshire, England
Registered: Jun 2000

posted 22 March 2001 11:12 AM     Click Here to See the Profile for Geoff Cotton   Click Here to Email Geoff Cotton     Edit/Delete Message   Reply w/Quote
Would your collegues drive a car with 67% error in the feul gauge?

If you can't trust your data because you can't trust the measurmant system, you can't make any reliable decisions.

Geoff

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