What is a Nested GR&R and Crossed GR&R (Gage R&R)

C

Calibrator24

Hello everyone,

I have come acrossed with the term "Nested GR&R" & "Crossed GR&R". What are they? Can the experts on this board please explain.

Thanks and God bless.
 
P

Pawel Scibiorek

Just quick explanation

Crossed Model​
A test material is measured by multiple appraisers over multiple trials. The appraiser-part paths cross.

Nested Model​
The parts measured by one (1) appraiser are different from those measured by a second appraiser. The parts are “nested” with each appraiser.

Graphics in the file attached
 

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