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	Measurement Systems Analysis  ReliaWiki: Gage Linearity and Bias Study

Linearity and Bias Folio

The linearity and bias folio is used to estimate the accuracy of a measuring device, or gage. Accuracy is defined in terms of bias and linearity.

• Bias is the difference between the "true" value of a measured part and the observed average. For example, if the reading of a scale is always much higher than the actual weight of the measured object, then the scale has a bias issue.

• Linearity is the relationship between a gage's bias and the "true" value of the measured part. For example, if the bias of a scale increases rapidly as the weight of the measured object increases, then the scale has a linearity issue.

To add a linearity and bias folio to your project, choose Insert > Test and Planning > Linearity and Bias.

• Linearity and bias folio control panel

• Linearity and bias folio Data tab

• Linearity and bias folio analysis results

• Linearity and bias folio plots

• Example of using a linearity and bias folio

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