I have competed several destructive R&R’s in the past. You have 2 options
Use the Wheeler control chart method. There is a paper on this I obtaied from the web before, but am unable to locate it at the moment. Do a web search. I found it pretty good
The easier option is to use the std method in minitab. If your R&R comes out low your gauge should be acceptabe as the total R&R will include within part variation, this should obviously be zero but won’t be as the parts are destroyed.Your true R&R will actually be lower then this.
Unfortunately both methods require homogeneous parts so be careful when selecting them.
good luck
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