J

I am doing a GR&R (Crossed) in Minitab 16. I am measuring lengths of widgets that can be anywhere from 5 cm to 120 cm. We are measuring to the closest mm. (for example: 8.5cm, 98.0cm, 60.1cm)

I am trying to figure out what to enter for "Upper spec - Lower spec". Does that mean the Upper spec - Lower spec for one widget, or for all measure widgets?

If it is for one, the tolerance is something like +/-1.3 cm (2.6), if it is for all.. then would it be 120-5 = 115?

I ask because I want to see the %Tolerance for GR&R and these numbers output very different results.

Thanks