4.0 Gauge Repeatability and Reproducibility Gauge Repeatability and Reproducibility, or GR&R, is the primary method of analyzing the statistical properties of check fixtures or gauges that collect variable data. TSL requires that the GR&R is run using a 10-3-3 configuration, as per section 3.3. The GR&R can be performed using a few different methods. Range method, Average and Range method, and the ANOVA method (AIAG, 2010). The ANOVA method is TSL’s preference because it includes the interaction of operator to part, and is generally a more accurate methodology. Due to its wide spread use, TSL is also accepting the AIAG Average-Range methodology, covered in Section 4.2.