| value attributed to a particular quantity and accepted, sometimes by convention, as having an uncertainty appropriate for a given purpose
NOTE 1 – This term is used in the "uncertainty" approach.
NOTE 2 – The "conventional true value" is sometimes called "assigned value", "best estimate of the value", "conventional value" or "reference value". The term "reference value", in this sense, should not be confused with "reference value" in the sense used in 311-07-01.
NOTE 3 – Frequently, a large number of results of measurement of a quantity are used to establish a conventional true value.
NOTE 4 – Traditional definitions, based on the true value approach, treated the conventional true value as a value approximating to a true value of the quantity such that the difference could be neglected for the purposes for which that value was used.