GR&R for Destructive Measurement Systems

Gage repeatability and reproducibility (GR&R) studies provide information on measurement system performance by analyzing measurement error from various sources. A statistical evaluation of the variability in a measurement system is an important aspect of product quality because if not performed, it can lead to poor quality product being shipped to customers and reduce profitability by causing good parts to be rejected. In a typical GR&R study, repeatability is determined by repeating measurements on the same part several times. Sometimes it is not possible to find a nondestructive substitute measurement system. In these cases find parts that are so uniform in the property to be measured so it can be assumed they are the same part. GR&R studies help judge whether a measurement system is trustworthy, even with a destructive measurement system. Consequently, they help to increase profitability and product quality.