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Falcon
Falcon
Level I

which G rand R value should I look at?

Created: Nov 18, 2022 06:43 AM  |  Last Modified: Jun 10, 2023 1:53 PM (1113 views)

hi

I have a question regarding Gage R&R in jump.

I have done a study and I am getting 2 Gage R&R values. I am not sure which one is the one.

I think the 38 % ?

am I correct or the 14% is the right value for the study?

Falcon_0-1668771702607.png

 

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Accepted Solutions
ChristianBille
ChristianBille
Level IV
Solution

Re: which G rand R value should I look at?

Nov 18, 2022 07:21 AM (1106 views)  |  Posted in reply to message from Falcon 11-18-2022

Hi Falcon, 

 

Welcome to our community!

 

The way I read the chart is that:  

 

The 36,172 is a number showing how much of the total variation is comming from your GRR study. In other words 36,172 of your variation is due to your measurement equipment and procedure. 

 

The 13,08 % is how much of the much of the uncertainty in your GRR you can affect by improving your measurement setup.

 

The intresting number here is what is found under Guage RR (RR) which is 0,9291148. That number is how much uncertainty you need to include in your uncertainity budget. Keep in mind that that number is 6*stddev (where k=6). 

 

If you compare that number to your specification/tolerance window you would see how much of your tolerance window is used by your measurement uncertainty.  This number is also called Precision to Tolerance Ratio or PT Ratio.

 

Hope that helps

Best Christian 

 

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ChristianBille
ChristianBille
Level IV
Solution

Re: which G rand R value should I look at?

Nov 18, 2022 07:21 AM (1107 views)  |  Posted in reply to message from Falcon 11-18-2022

Hi Falcon, 

 

Welcome to our community!

 

The way I read the chart is that:  

 

The 36,172 is a number showing how much of the total variation is comming from your GRR study. In other words 36,172 of your variation is due to your measurement equipment and procedure. 

 

The 13,08 % is how much of the much of the uncertainty in your GRR you can affect by improving your measurement setup.

 

The intresting number here is what is found under Guage RR (RR) which is 0,9291148. That number is how much uncertainty you need to include in your uncertainity budget. Keep in mind that that number is 6*stddev (where k=6). 

 

If you compare that number to your specification/tolerance window you would see how much of your tolerance window is used by your measurement uncertainty.  This number is also called Precision to Tolerance Ratio or PT Ratio.

 

Hope that helps

Best Christian 

 

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