In metrology, measurement uncertainty is a non-negative parameter characterizing the dispersion of the values attributed to a measured quantity. The uncertainty has a probabilistic basis and reflects incomplete knowledge of the quantity. All measurements are subject to uncertainty and a measured value is only complete if it is accompanied by a statement of the associated uncertainty. Fractional uncertainty is the measurement uncertainty divided by the measured value.
Codex has guidelines on Measurement Uncertainty, CAC/GL 54-2004.
Read more about Measurement Uncertainty: Background, Random Errors and Systematic Errors, GUM Approach, Measurement Model, Propagation of Distributions, Type A and Type B Evaluation of Uncertainty, Sensitivity Coefficients, Stages of Uncertainty Evaluation, Models With Any Number of Output Quantities, Joint Committee For Guides in Metrology, Alternative Perspective
Famous quotes containing the words measurement and/or uncertainty:
“That’s the great danger of sectarian opinions, they always accept the formulas of past events as useful for the measurement of future events and they never are, if you have high standards of accuracy.”
—John Dos Passos (1896–1970)
“It was your severed image that grew sweeter,
That floated, wing-stiff, focused in the sun
Along uncertainty and gales of shame
Blown out before I slept. Now you are one
I dare not think alive: only a name
That chimes occasionally, as a belief
Long since embedded in the static past.”
—Philip Larkin (1922–1986)