Structure your data so that each row contains the Part, Operator (optional), up to eight additional factors (optional), and the observed measurement. All factors can be text or numbers, fixed or random, and crossed or nested. Gage R&R (Expanded) studies can be balanced or unbalanced.
See Create Gage R&R Study Worksheet to set up and randomize your worksheet (for part and operator only). See Gage R&R Sample Size Guidance for more information on selecting the number of parts, operators, and trials to use in your study.
Note
If you use destructive testing, you must be able to assume that all parts within a single batch are identical enough to claim that they are the same part.