The R&R Summary for the AIAG data which is generated by Mesa is
Note that if we add the percentages on the
right-hand column they add to well over 100%.
This is a peculiarity of the R&R approach and is caused
by the practice of calculating percentages of the standard
standard deviations are not additive then the individual percentages
do not add to 100%. Note
that this is one aspect of the R&R approach which has been
criticised, and can easily lead to capable measurement systems being
labelled as inadequate.
When comparing the numerical results in the AIAG manual with those
generated by MESA you may find small differences (~1%).
This is because MESA uses the formulae given by Wheeler in
his book on industrial experimentation to calculate the values of d2*,
rather than take them from an internal table.