2. Cumulation model
As with all measurements, the first thing to do is to define the object to be measured (measurand). The definition of the measurand is particularly important in the case of aggregations, as it removes any potential controversy over the legitimacy of aggregating measurements obtained from quantities that may be radically different.
Some examples of accumulations are given below:
annual sum of chemical contaminant discharges in a plant's effluent: the total is calculated from multiple samples taken throughout the year;
total tritium activity in liquid effluent, calculated by summing free tritium and organically bound tritium. In this case, the sample is identical, but the analytes (free tritium and organically bound tritium) are different;
concentration...
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Cumulation model
Bibliography
Standards and norms
- International Vocabulary of Metrology – Fundamental and general concepts and associated terms (VIM) Ed. 3 http://www.bipm.org - JCGM 200 - 2012
- Statistics – Vocabulary and symbols – Part 1: general statistical terms and terms used in probability calculations - NF ISO 3534-1 - 2007
- Statistics – Vocabulary and symbols – Part 2: Applied statistics - NF ISO 3534-2 - 2006
- Measurement data evaluation...
Directory
Organizations – Federations – Associations (non-exhaustive list)
International Bureau of Weights and Measures (BIPM) http://www.bipm.org
International Union of Pure and Applied Chemistry (IUPAC) http://www.iupac.org
International Organization...
Software tools
Minitab ® http://www.minitab.com
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