Hi all,
We are a commercial calibration lab, and one of our customers is requesting that we do a R&R study on everything they send in, and they want it done using only 2 appraisers and 2 readings each.
1. Every GR&R I've ever seen has at least 3 appraisers for 5 readings each (3 x 5 for short.) Is it possible to even get valid results using only a 2 x 2 study?
2. This is the first time we've ever had to do a GR&R for a customer. Since our calibration techs are NOT the same people who will be using the gages in the field, doing it in the first place seems kinda pointless. Maybe the customer is trying to gage our effectiveness in calibrating their test equipment? First we calibrate the gages, then we do the R&R study. Shouldn't they be wanting us to give them an uncertainty report instead? After all, we are an ISO 17025 accredited lab.
3. Among the usual things (e.g. micrometers, scales, etc.), they are wanting us to do R&R studies on digital multimeters and insulation testers. How the heck do you do a R&R study on a high voltage insulation tester?? :mg:
Sounds to me like the customer has been told they need to do GR&R studies by an auditor, and doesn't have the resources (or know-how for that matter). The guy who has been bringing their equipment to us for years admits even he doesn't know why his company is wanting us to do GR&Rs for them or how we are to do it. Is there some sage advice we can give them, like what equipment is normally subject to a GR&R, the minimum number of readings to take, who gets to do it, etc.?
We are a commercial calibration lab, and one of our customers is requesting that we do a R&R study on everything they send in, and they want it done using only 2 appraisers and 2 readings each.
1. Every GR&R I've ever seen has at least 3 appraisers for 5 readings each (3 x 5 for short.) Is it possible to even get valid results using only a 2 x 2 study?
2. This is the first time we've ever had to do a GR&R for a customer. Since our calibration techs are NOT the same people who will be using the gages in the field, doing it in the first place seems kinda pointless. Maybe the customer is trying to gage our effectiveness in calibrating their test equipment? First we calibrate the gages, then we do the R&R study. Shouldn't they be wanting us to give them an uncertainty report instead? After all, we are an ISO 17025 accredited lab.
3. Among the usual things (e.g. micrometers, scales, etc.), they are wanting us to do R&R studies on digital multimeters and insulation testers. How the heck do you do a R&R study on a high voltage insulation tester?? :mg:
Sounds to me like the customer has been told they need to do GR&R studies by an auditor, and doesn't have the resources (or know-how for that matter). The guy who has been bringing their equipment to us for years admits even he doesn't know why his company is wanting us to do GR&Rs for them or how we are to do it. Is there some sage advice we can give them, like what equipment is normally subject to a GR&R, the minimum number of readings to take, who gets to do it, etc.?


have very strange requirements, like the ones who want all the data taken on their gages to be hand-written onto their forms (with carbon paper in between duplicates) instead of accepting the computer printouts we normally provide. 
)