Re: Justifying not doing Gage R&R Studies
Dear Mnavarro:
The Gage R&R is perform to get an estimate of the precision of your measurement system.
In other words, if your measurement system is perfect and you measure the same part multiple times, you will always get the same number. In practice, since measurement systems are not perfect, the observed variation coming from measuring the same part will provide you with an estimate of the measurement system error (During a real gage study you use several parts in order to improve the confidence interval of your estimate).
When you calibrate a measurement system, you are adjusting its bias. In other words, you are adjusting its accuracy.
General Note:
When you don’t have a gage R&R study, you don’t have any information with regards the precision of the measurement system. The implications are uncertainty in your pass/fail criteria. You could end up accepting bad parts and rejecting good parts.
The only way that you could justify not doing a Gage study is to somehow show objective evidence that you are protecting the customer.