AIAG's MSA Manual 3rd Edition - A Look at K Values - Auditor Questions

I

infraray

#1
MSA 3rd Edition question

Hello,

I first want to say this is a great forum with a lot of helpful info. I appreciate the service!

The question I have is: We just went through our QS audit and the auditor was questioning what we knew about the K values. with regard to GR&R. In his questioning he asked us why they change in the 3rd edition. I had no reply. Of course he wasn't looking for trouble just trying to see if it made sense to anyone else.

I understand that the K values are based upon the 5.15 @ 99%/ d2. However in the 3rd edition it is now based upon a smaller area under the curve. (Can't remember the exact number right now.) So can anyone tell me what's the deal? It looks like they got a little lenient on us or maybe I am just missing something.

Thanks for any assistance anyone can give.

Keith
 
Elsmar Forum Sponsor
I

infraray

#3
Thanks for the assistance, however I am still not convinced with what AIAG is saying. If I put in the new(3rd) edition K values I will get a different GRR. I have verified my excel spreadsheet to the data in the MSA and everything is correct. If I change K values however I get a different GRR%. According to AIAG the K values cancel out. This doesn't appear to be the case. Hmmm...
 
A

Andrews

#4
Are there many changes in the 3rd edition of MSA manual?Do we have to redo all the MSA conducted till now.Sorry Iam curious because I have not yet got the new edition with me.
 

Atul Khandekar

Quite Involved in Discussions
#5
The third revision is said to be more than a 100 pages longer than the second one.

I don't really think you will have to redo the MSA studies you conducted in the past and I don't think bad gages will become good (or vice versa) with new calculations. ;)
 
A

a_amirahmadi - 2002

#6
MSA 3rd Edition

Does any one know where I can get a copy of MSA manual 3rd edition or differences bitween 2rd and 3rd edition?:)
 

xfngrs

Quite Involved in Discussions
#8
Does anybody know of a training supplier for MSA other than AIAG? Manager thinks AIAG is too expensive.:bonk:
 
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