Last week, a customer called with an issue related to running a Gage R&R nested design in Minitab Statistical Software. Everything initially looked okay, as he had the three columns necessary to perform a successful study: one for parts, one for operators, and another for the measurements. However, when he tried to analyze his data using Stat > Quality Tools > Gage Study > Gage R&R (Nested), he would get this error message:
Gage R&R Study - Nested ANOVA
* ERROR * Design is not balanced; execution aborted.
One of the assumptions in performing a Nested Gage analysis is that the data is balanced,...