Difference between EMP Gauge R&R and AIAG Gauge R&R

[#1]

On JMP, there 2 options that you could find GRR% value from either EMP or either from AIAG option. Which one is showing GRR% on AIAG standard?

I could not understand the logic behind two GRR% values found by two different options. What could be the formulas behind these two?

[#2]

You should find the answers from JMP documentation https://www.jmp.com/support/help/en/18.0/#page/jmp/measurement-systems-analysis.shtml and https://www.jmp.com/support/help/en/18.0/#page/jmp/variability-gauge-charts.shtml.

% of Tolerance is for example mentioned here https://www.jmp.com/support/help/en/18.0/#page/jmp/gauge-rr-report.shtml