# Bev D and "Gage R&R"

#### Bev D

##### Heretical Statistician
Super Moderator
I have compiled some of my thoughts on the popular gage R&R method per the request of one of our 'frequent flyers'.
I hope some of you find it useful...

#### Attachments

• The Statistical Foundation Cracks in the Common Gauge R.docx
219.4 KB · Views: 176

#### Candi1024

##### Quite Involved in Discussions
"The overall sample size of 10 parts x 3 repeated readings yields 30 total measurements. The difference in precision of the dispersion estimate for 3 repeated readings is not substantially better than for 2 repeated readings. If we use 2 repeated readings we can increase the number of parts to 30 and maintaining the same number of overall measurements while improving the informative value of the study."
10x3 = 30
30x2 = 60
You say it maintains the same number of overall measurements but I'm not understanding how that is possible.

#### Bev D

##### Heretical Statistician
Super Moderator
Oops. Got carried away. I will correct tonight