IEVref:112-01-35ID:
Language:enStatus: Standard
Term: ordinal quantity
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Definition: quantity, defined by a conventional measurement procedure, for which a total ordering relation can be established, according to magnitude, with other quantities of the same kind, but for which no algebraic operations among those quantities exist

NOTE 1 – Ordinal quantities can enter into empirical relations only and have neither units of measurement nor dimension. Differences and ratios of ordinal quantities have no physical meaning.

NOTE 2 – Ordinal quantities are arranged according to ordinal value scales.

NOTE 3 – Examples: Rockwell C hardness, octane number for petroleum fuel, earthquake strength on the Richter scale, subjective level of abdominal pain on a scale from zero to five.


Publication date:2010-01
SourceISO/IEC GUIDE 99:2007 1.26
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