Statistics Meeting Book (May 15, 2019)

Reference: Codex Alimentarius Commission, Procedural Manual, 1 7 th Edition, 2007

Measurand: Quantity intended to be measured. Notes:

The specification of a measurand requires knowledge of the kind of quantity, description of the state of the substance carrying the quantity, including any relevant component and the chemical entities involved. In chemistry, ‘analyte’ or the name of a substance or compound are terms sometime used for measurand. This usage is erroneous because these terms do not refer to quantities. Reference: VIM, International Vocabulary of Metrology – Basic and general concepts and associated terms, 3 rd edition, JCGM 200: 2008 Measurement method: Generic description of a logical organization of operations used in a measurement. Note: Measurement methods may be qualified in various ways such as: substitution measurement method, differential measurement method, and null measurement method; or direct measurement method, and indirect measurement method. Reference: VIM, International Vocabulary of Metrology – Basic and general concepts and associated terms, 3 rd edition, JCGM 200: 2008 Measurement procedure: Detailed description of a measurement according to one or more measurement principles and to a given measurement method, based on a measurement model and including any calculation to obtain a result. Notes: A measurement procedure is usually documented in sufficient detail to enable an operator to perform a measurement. A measurement procedure can include a statement concerning a target measurement uncertainty. A measurement procedure is sometimes called a standard operating procedure (SOP). Reference: VIM, International Vocabulary of Metrology – Basic and general concepts and associated terms, 3 rd edition, JCGM 200: 2008