Measurement Assurance Linearity

Measurement Assurance Linearity

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Linearity is a measure of the bias change throughout the operating range of the gage. Measurement system linearity is found by measuring reference part values throughout the operating range of the instrument, and plotting the bias against the reference values. The default procedure for determining linearity is to measure 10 parts 5 times each. The percent linearity is equal to the slope, b, of the best-fit straight line through the data points, and the linearity is equal the slope multiplied by the process variation.

Input the measured values into the Gage Linearity spreadsheet along with the process variance, if desired, click the Compute Linearity button, and the linearity study is complete. Click the print icon, and the results appear in the Report Writer. Right-click on the graph, and a tabbed dialog box appears that allows you to customize the graph.

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