Accuracy

«Accuracy describes the difference between the measurement and the actual value of the part that is measured. It includes:

• Bias: a measure of the difference between the true value and the observed value of a part. If the “true” value is unknown, it can be calculated by averaging several measurements with the most accurate measuring equipment available.
• Linearity: a measure of how the size of the part affects the bias of a measurement system. It is the difference in the observed bias values through the expected range of measurement [1].»

  

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It is «analogous to uncertainty relative to a reference, is in its simplest terms the difference between measured and “true” values [2].»

Bibliographic references:

[1] Reliawiki. 2017. Measurement System Analysis. [online] Available at: <https://reliawiki.org/index.php/Measurement_System_Analysis> [Accessed 20 February 2022].

[2] Apogeeinstruments.com. 2022. Uniformity, Repeatability, Stability, and Accuracy. [online] Available at: <https://www.apogeeinstruments.com/uniformity-repeatability-stability-and-accuracy/> [Accessed 20 February 2022].