Use this study to compare the measurements system variation to total process variation and/or tolerance. If the measurements system variation is a large proportion of the total variation, the system may not be capable of distinguishing between parts.
A crossed gage R&R study can answer questions such as:
Is the variability of a measurements system small compared with the process variability?
Is the variability of a measurements system small compared with the process specification limits?
How much variability in a measurements system is caused by differences between operators?
Is a measurements system capable of discriminating between differences parts?