1. Variable Gauge R&R Part Selection
Think about your specification ranges when selecting parts
Parts should represent the normally expected range for a part
This implies you have data
Specification Width
(Pass/Fail Criteria)
Part Selection Range
Variable Gage RR

2. Variable Gauge R&R Part Selection – The Wrong Way
Specification Width
(Pass/Fail Criteria)
Part Selection Range
Failed Gage R&R trying to distinguish this
WHEN YOU SHOULD HAVE BEEN LOOKING AT THIS
The gage may be fully capable of distinguishing part-to-part within the specification
Beware of “more decimals is better”
Variable Gage RR

3. Variable Gauge R&R Part Selection – The Wrong Way
Part Selection Range
(Multiple sizes in product line )
Individual Part size Range
When you should have been looking at this
Passed Gage R&R Looking At This
You know the gage is capable distinguishing parts from one product size to another
You do not know if it can separate good from bad within a specific size
Variable Gage RR