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bbenny7
bbenny7
Level III

How do I interpret Gauge R&R Results?

May 5, 2023 10:06 AM (1485 views)

I have two questions about Gauge R&R results:

  1. If I calculate a Gauge R&R value with 6*StdDev, do I have to report the measurement uncertainty as +-3*StdDev with confidence interval of 99.73?
  2. Since JMP fits some models to calculate the different components, is there any error with these values? The reason I ask is because I have to two different sets of data, and I would like to know if the difference I see is statistically significant.

 

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2 REPLIES 2
shampton82
shampton82
Level VII

Re: How do I interpret Gauge R&R Results?

May 5, 2023 02:12 PM (1471 views)  |  Posted in reply to message from bbenny7 05-05-2023

Correct, the precision of your measurement system is +/- 3*StdDev if you want to have it contain 99.73% of your measurement error distribution.  You can adjust the reported X*StdDev depending on the criticality of the measurement error.

 

If you right click on the Variance Components for GRR box you can ask for the 95% confidence levels.

shampton82_0-1683310222858.png

 

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bbenny7
bbenny7
Level III

Re: How do I interpret Gauge R&R Results?

May 8, 2023 10:30 AM (1442 views)  |  Posted in reply to message from shampton82 05-05-2023

Thanks for your answer, it is very useful.

One more question: the variance components table has only Reproducibility, whereas the Gauge R&R table splits the Reproducibility in two parts, operator and operator*part.

Is it possible to get the variance component for these two parts together with 95% Lower and 95% Upper?

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