= Evaluation of measurement data — Guide to the expression of uncertainty in measurement by JCGM
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{title2=JCGM 100:2008}
= Guide to the expression of uncertainty in measurement by JCGM
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https://www.bipm.org/documents/20126/2071204/JCGM_100_2008_E.pdf
JCGM100:2008, GUM1995 with minor corrections; first edition September2008. Sections5.1–5.2 give first-order combination of standard uncertainties for independent and correlated inputs; covariance terms enter through the measurement-model sensitivity coefficients.
Evaluation of measurement data — Guide to the expression of uncertainty in measurement, JCGM100:2008, GUM1995 with minor corrections, first edition September2008. Sections5.1–5.2: sensitivity coefficients and propagation of uncertainty; equation(13): correlated-input covariance contribution. Sections5.2.4–5.2.5 explain common-instrument/reference-data correlations and require significant covariances to be included.
The PDF title page also identifies the corrected version2010. Sections5.1.3–5.1.4 define sensitivity coefficients and describe their experimental determination. Section5.2.2, equations13–16, propagates correlated inputs; §5.2.4 identifies common instruments, standards and reference data as correlation sources.
https://www.bipm.org/documents/20126/2071204/JCGM_100_2008_E.pdf[Section4.2.3, equation5: experimental variance of a mean from independent observations. Sections5.1.3–5.1.4 define sensitivity coefficients; section5.2.2, equation13, retains covariance contributions; section5.2.4 identifies common instruments, standards and reference data as sources of correlation. These distinguish the spread of individual reset pedestals from uncertainty in a finite blank correction reused across acquisitions.]
Official ISO-hosted text of Chapter 5: https://www.iso.org/sites/JCGM/GUM/JCGM100/C045315e-html/C045315e_FILES/MAIN_C045315e/05_e.html . Sections 5.2.2–5.2.4 retain covariance contributions and identify common instruments, measurement standards and reference data as sources of correlation; Annex F.1.2.3 gives practical shared-reference cases.
Official ISO-hosted Chapter 4: https://www.iso.org/sites/JCGM/GUM/JCGM100/C045315e-html/C045315e_FILES/MAIN_C045315e/04_e.html . Section 4.1.2 requires significant correction/influence quantities in the measurement model and discusses incomplete modeling; section 4.2.5 treats standard uncertainties of least-squares fit parameters.
Official primary PDF: https://www.bipm.org/documents/20126/2071204/JCGM_100_2008_E.pdf . JCGM 100:2008, corrected version 2010, Section 5.2 gives correlated-input uncertainty propagation; Annex F.1.2 discusses correlations from shared inputs. These supply the covariance framework for the original equal-offset cancellation and unequal-sensitivity examples in <spectral common-mode offset rejection>.
JCGM 100:2008, Annex E.3.3 distinguishes propagation of standard deviations from propagation of confidence intervals; the note to section 5.1.2 discusses significant nonlinearity and higher-order terms. Official primary PDF: https://www.bipm.org/documents/20126/2071204/JCGM_100_2008_E.pdf .
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