Precision/ Accuracy and their Importance in Engineering Design
In engineering measurement terms such as error, precision, accuracy, tolerance and uncertainty are used frequently and occasionally interchangeably. Yet in metrology, the science of measurement, each of these terms means something different and must be used correctly. Engineering projects depend on getting the details right. The terms “accuracy” and “precision” are often used when discussing random and systematic errors – but they should be applied with care. “Accuracy” indicates the closeness of a measurement to the true value but it cannot be quantified because it is not possible to know the true value. “Precision” is a description of repeatability and is sometimes used, incorrectly, to mean accuracy
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