EMP GRR : AIAG reproducability

[#1]

using ANOVA from Fit Model and then GRR EMP + AIAG GRR , we are matching the Within Repeatability Variance and Part to Part Variance but :

the Reproducability Variance is expected to be zero ( actually it was negative ) 

Can we get help to understand from where the Reproducability Var component is worked out ?

Please use the truncated data in the files 

[#2 · Accepted solution]

Thanks @carloaz. In Fit Model, if we uncheck the Unbounded Variance Components Option, then this will allow that negative variance estimate for Operator to be bounded at zero, and the results will match identically with what you for the Variance Components in the EMP Gauge R&R Report (see attached). 

[#3 · Accepted solution]

Here are the results which show complete agreement between Fit Model (Fit Standard Least Squares with REML) and the EMP GRR Platform, where "Residual" is equal to "Within" (see attached).