Measurement System Analysis - Attribute GRR - How kappa is calculated

A

antony78

#1
Can any one please tell me what kappa calculates. I know how kappa is calculated. But what does the numerator and denominator in the kappa measure denote or trying to say.

In signal Detection, we calculated the distance of disagreement 'd'. Why do we use 5.15 SD to calculate %GRR. What does 5.15 mean.

:thanks:
 
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#2
antony78 said:
Why do we use 5.15 SD to calculate %GRR. What does 5.15 mean.
5.15 SD corresponds to 99% of the variation. This was used as the standard for GRR calculations until MSA 3rd ed. was released. Now, you may use 5.15 or 6 SD, but the emphasis is towards 6 SD.
 
A

antony78

#3
:thanx:

Can you tell something about kappa. The numerator in kappa finds the excess of observed counts to the expected count. The denominator finds the non-concordant expected value. If this correct, then numerator and denominator does not match. If this is not correct, can you explain what kappa calculates in the numerator and denominator.
 
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