Accuracy
closeness of agreement between a test result or measurement result and the true value. 1) In practice, the accepted reference value is substituted for the true value. 2) The term “accuracy,” when applied to a set of test or measurement results, involves a combination of random components and a common systematic error or bias component. 3) Accuracy refers to a combination of trueness and precision.b
b:ISO 3534-2:2006