The concept of a measurand
It is understood that the
result of the measurement
including all required
corrections is the
best estimate
of the value of the measurand.
However, since the measurand cannot be completely specified without an
infinite
amount of information, the result of a measurement is only an
approximation
or
estimate
of the value of the measurand.
It means: All possible outcomes of a measurement are subjected to a
probability distribution
.
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Thus the estimate of the value of the measurand is
complete only
when it is
accompanied by a statement of the
uncertainty of that estimate
.




