Evaluating the Measurement Process – Part 1

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Thanks so much for reading our publication. We hope you find it informative and useful. Happy charting and may the data always support your position.


Dr. Bill McNeese
BPI Consulting, LLC

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Measurement Systems Analysis/Gage R&R

Comments (6)

  • Sergey GrigoryevDecember 31, 2014 Reply

    Спасибо за подробное объяснение проблемы, которые, как правило, обошел в методах использования контрольных карт Шухарта.

    • billJune 27, 2019 Reply

      I tried to translate this using Google: this is what it said “Thanks for the detailed explanation of the problem, which is usually walked in the way of using Shewhart control charts.” Thanks for the feedback.

  • Stephen PuryearJanuary 5, 2015 Reply

    Thanks to all of you who are responsible for creating this particular outlook on this area. Initially, I thought that using control charts would help me apply a solid and different perspective to the challenge of educating myself and others about estimating measurement uncertainty. As I dove into the resources you have provided I have been suprised to find as much controversy as any other topic in applied statistics. I guess that I assumed that this area was all well settled because it was a topic on the ASQ Quality Engineer exam and because it has been discussed for such a long period! I appreciate your non-confrontational, non-troll approach to educating others about the topics here. Please keep it up!

  • Jeff ParkerFebruary 4, 2015 Reply

    Both Parts 1 and 2 were outstanding.  You make a tremedously difficult topic very, very understandable and useful!Jeff

  • Daniel AltenlohOctober 31, 2018 Reply

    Howdy,  You echo Wheeler's concern about overspecifying the gage requirements using the standard AIAG manual.  Also, I noticed that you take a similar stance about a gage with "32%" may be just fine for a test step.  The Intraclass Correlation is a truly classical metric and I think it offers a better first appproach to simply answer if the gage is ok or not — then ANOVA or something else can be used for iddentification of the issues.  Wheeler posed his 4 classes, and he's also done a lot of work on this.  I also had basically dropped the AIAG except when the test spec required the high precision.  And I have revamped GRR completely for internal purposes.  Now, for the question:  It has been several years since all this came out.  MSA 4th Ed did not adopt any changes.  Is AIAG looking at a new edition of the MSA which will include a robust treatment of the ICC, as well as numerous other changes that I (and I think you, others and Wheeler) think should be done?Thanks

    • billOctober 31, 2018 Reply

      Hello.  Thanks for the comment. I am not aware that AIAG is doing anything to update their information.   I believe they need to.

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