Dictionary · General
Measurement procedure
A detailed description of a measurement according to a principle and method, based on a measurement model — detailed enough that a trained operator can perform it. The SOP is its documented form.
Related terms
More from General
Influence quantity
A quantity that, in a direct measurement, does not affect the quantity actually measured but does affect the relation between the indication and the result — ambient temperature is the classic example.
VIM (JCGM 200:2012) 2.52
True quantity value
The quantity value consistent with the definition of the quantity. In practice unknowable; measurement estimates it with stated uncertainty.
VIM (JCGM 200:2012) 2.11
Measurement error
Measured quantity value minus a reference quantity value; comprises a systematic component and a random component.
VIM (JCGM 200:2012) 2.16
Measurement result
The set of quantity values attributed to a measurand together with any other available relevant information — generally a measured value with its measurement uncertainty.
VIM (JCGM 200:2012) 2.9
Measurement accuracy
Closeness of agreement between a measured value and a true value of the measurand. A qualitative concept — a measurement is more accurate when it offers smaller error, but accuracy itself is not a number.
VIM (JCGM 200:2012) 2.13
Metrology
The science of measurement and its application — including all theoretical and practical aspects, whatever the uncertainty and field of application.
VIM (JCGM 200:2012) 2.2