You are actually conducting 4 R&R’s one for each measurement.īe sure that you measure each part in the same order (1-10) for each operator and replication among operators. minitab does some strange things with Std Dev when combining multiple measurement points into one calculation, or this has been my experience.Įach operator will have to measure each part a minimum of 2 but I recommend 3 timesĮach measurement will require its own R&R. So I recommend #2 below as its just as easy. My Theory behind doing seperate calcs is that if one measurement is bad and the rest are good you can easily see it and simply redo one measurement to confirm instead of doing all 4 over. I believe minitab can handle all 4 points at the same time, but exactly recal how, its been awhile and the setup is tricky if I remember correctly.
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