Every quality decision is based on a measurement. If the measuring instrument is prone to variation, what we believe to be process variability is actually partly due to the instrument itself: control charts go haywire for no reason, process capabilities are underestimated, and conforming parts are rejected. Similarly, any statistics that are calculated could be skewed by inaccurate data. Validating the measurement method precedes the process study : That is the purpose of the Gage R&R menu.
Click on the «Data Analysis» menu, then on «Gage R&R.».
