# Gauge R&R Report (ANOVA Method)

Analysis of Variance (ANOVA) is a statistical technique for analyzing data that tests for a difference between two or more means by comparing the variances "within" groups and variances "between" groups.

The Average & Range method (XBar & R) is a mathematical method which will provide an estimate of both repeatability and reproducibility for a measurement system. Average and range method allows the measurement systems to be decomposed into two separate components, repeatability and reproducibility, but not their interaction.

The ANOVA method can be used to determine this interaction between the gauge and the appraisers.

However both the Average and Range method and ANOVA method will provide information concerning the causes of measurement system or gauge error.

This report displays the results of Gauge R&R Study using the ANOVA method. All readings and calculated results are displayed. The results are shown in terms of the Repeatability percentage, Reproducibility percentage, percentage of Part Variation, percentage Interaction, percentage R&R and Total Variation percentage.

Repeatability percentage is the Equipment Variation percentage.

Reproducibility percentage is the Appraiser (Operator) Variation percentage.

Percentage Interaction is the interaction of part and appraiser percentage.

The calculations of percentage contribution of variations are based on Total Variation, Process Variation or Tolerance value.