AIAG MSA book
nancichan said:
Hello, thanks for the book recommendations, I have bought the Evaluating the Measurement Process book and it doesn't seem to tell me exactly what I need to know. What I need to know is quite simple, and I really hope someone can help me. I understand a bit of mathematics, and would like to know how to calculate the Equipment Variation (E.V.) and the Appraiser Variation (A.V.) I have got sets of results that I am going to work with...I have seen a few spreadsheets but would simply like to know how the calculations are made...This is especially important when I sometimes get different E.V. and A.V. Values from different spreadsheets, with the same data!
nancichan said:
I know what the targets for these EV and AV values are, but I would just like to know what the formulas are to calculate them. I know there are some K-Constants in there somewhere - Please could somebody explain this?
Many thanks, fingers crossed for someone who can help!
Nanci
Hi Nanci
The AIAG MSA Manual most definitely will explain these formulas.
I also have the Wheeler book and it is a much different (better?) approach.
Last year I broke down and made a study of the MSA manual, just like I was back in school. We had troubles with "poor" GR&R on World Class equipment and it fell to me to find out why.
I made notes, worked all the examples, built some spreadsheets, and kept reviewing it until I finally got it. I think I still have my notes, I would happily share them if you like, but be warned they are rough study guides for my own use and may not help much.
It took some time and effort but all became clear.
Each spreadsheet I have seen rounds off slightly differently and gives numbers just different enough to drive you crazy. It seems that you have to carry every significant fugure you can in the calculations.
Good luck, I suggest the AIAG MSA as a good book.