The variability of the measurements obtained by one person while measuring the same item repeatedly is the repeatability of a gage. This is also considered the inherent variability of the gage.  Reproducibility is the variability introduced into the measurement system by the bias differences of different operators. Repeatability and reproducibility are commonly expressed as an index that represents the width of an interval that contains 99% of the measurements.

This software is capable of determining repeatability and reproducibility using

the Range Method,

the Range Average Method, and

the ANOVA method

Input the measured values into the Repeatability and Reproducibility spreadsheet, select the desired options, click the Compute Bias button, and the bias study is complete.  Click the print icon, and the results appear in the Report Writer.  The Chart button provides

a range control chart,

a run chart,

a whiskers chart,

a whiskers chart,

an X-Y plot of averages,

a comparison X-Y plot, and

a scatter plot

Right clicking any of the plots gives a tabbed dialog box that allows you to customize the graph.