Evaluating the Measurement Uncertainty

Evaluating the Measurement Uncertainty

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It is now widely recognized that measurement data should be properly analyzed to include an assessment of their associated uncertainty. Since this parameter allows for a meaningful comparison of the measurement results and for an evaluation of their reliability, its expression is important not only in the specialized field of scientific metrology, but also in industry, trade, and commerce. General rules for evaluating and expressing the uncertainty are given in the internationally accepted ISO Guide to the Expression of Uncertainty in Measurement, generally known as the GUM. Evaluating the Measurement Uncertainty details the theoretical framework on which the GUM is based and provides additional material on more advanced topics such as least-squares adjustment and Bayesian statistics. The book does not require previous knowledge other than elementary calculus and can be read as a complement to the GUM or as a stand-alone reference source. It stresses fundamental principles and illustrates their applications through numerous examples taken from many different fields of metrology. The book includes practical guidance as well as theoretical aspects, resulting in an invaluable resource for metrologists, engineers, physicists, and graduate students involved with measurements in academia and industry.The fact that this is not done leads to an uncertainty about the a#39;actuala#39; shape of the distribution or, equivalently, to an uncertainty about its a#39;truea#39; standard ... In contrast, suppose that the state of knowledge about each input quantity was encoded through an appropriate pdf. ... A typical result might be Ee = 100 GPa with a 10% relative standard uncertainty, equivalent to uE = 10 GPa. ... 1 to calculate Standard versus expanded uncertainty 1 1 7 4.7 Standard versus expanded uncertainty.

Title:Evaluating the Measurement Uncertainty
Author:I Lira
Publisher:CRC Press - 2002-04-09


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