% GR&R as a ratio of standard deviations vs. %GR&R of Variance Components
I have been completing GR&R studies for many years and have always used the %GR&R calculated in the lower portion of the GR&R report using Variance Components. JMP also reports a % GR&R in the upper part of the screen as a ratio of the RR standard deviation to the Total Variation. Can you please help me understand the benefit of one vs. the other. I seem to remember the the Variance Components num...