…the internationally agreed framework for evaluating and expressing measurement uncertainty — Type A/B evaluation, combination, and expanded uncertainty. Freely available from the BIPM. JCGM…
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121 results for “Measurement Uncertainty”
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Standard measurement uncertainty
Measurement uncertainty expressed as a standard deviation, denoted u — the common currency into which all components are converted before combination. VIM (JCGM 200:2012…
Guidance on constructing measurement models — the step the GUM assumes has already happened. Freely available. JCGM/BIPM Uncertainty
The probabilistic framework for conformity decisions: consumer and producer risk, acceptance intervals, and guard bands. Freely available. JCGM/BIPM Uncertainty
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Combined standard measurement uncertainty
The standard uncertainty obtained from the individual standard uncertainties (and covariances) of the input quantities through the measurement model — root-sum-of-squares in…
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Target measurement uncertainty
An uncertainty specified in advance as an upper limit, decided from the intended use of the result. VIM (JCGM 200:2012) 2.34 Uncertainty
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Type B evaluation of measurement uncertainty
Evaluation of a component of uncertainty by means other than statistical analysis of current measurements — calibration certificates, specifications, handbook data, assumed distributions. VIM (JCGM…
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Relative standard measurement uncertainty
A standard uncertainty divided by the absolute value of the measured quantity value — the form specifications and CMCs often quote (parts in 10⁶, percent…
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Null measurement uncertainty
The measurement uncertainty when the specified measured value is zero — what limits how confidently a null or tare reading can be trusted. VIM (JCGM…
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Instrumental measurement uncertainty
The component of measurement uncertainty arising from the instrument or system in use, typically obtained from its calibration. VIM (JCGM 200:2012) 4.24…