International Vocabulary of Basic and

International Vocabulary of basic and General Terms in Metrology. 2nd ed. International Organisation for Standardisation, 1993. 

VIM (1993) International vocabulary of basic and general terms in metrology and edition. ISO, Geneva, Switzerland... 

International Vocabulary of Basic and General Terms in Metrology , 2nd Edition, ISBN 92-67-10175-1, International Organization for Standardization (ISO), Geneva, Switzerland, 1993. 

Before continuing, let s see the official definition of traceability as given in the ISO international vocabulary of basic and general terms in metrology. Traceability is defined as the property of the result of a measurement or the value of a standard whereby it can be related to stated references, usually national or international standards, through an unbroken chain of comparisons all having stated uncertainties. 

The International Vocabulary of Basic and General Terms in Metrology (VIM), second edition (ISO 1993a), defines uncertainty of measurement as the parameter, associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand (term 3.9). In the third edition (Joint Committee for Guides in Metrology 2007), the term measurement uncertainty is defined (term 2.27), and reasonably attributed is replaced by attributed to a measurand based on the information used. This definition emphasizes that the estimate of uncertainty is only as good as the information used to calculate it, so a report of an uncertainty should also state what information was used to calculate the uncertainty. 

The final combined standard uncertainty, whether obtained using algebra or a spreadsheet or other software, is the answer, and can be quoted as such. I recommend using the wording Result x units [with a] standard uncertainty [of] uc units [where standard uncertainty is as defined in the International Vocabulary of Basic and General Terms in Metrology, 3rd edition, 2007, ISO, Geneva, and corresponds to one standard deviation]. ... 

International Standards Organization (1993) International Vocabulary of Basic and General Term in Metrology, 2nd edn. ISO, Geneva, ISBN 92-67-01075-1. 

The 1993 edition of the International Vocabulary of Basic and General Terms in Metrology (VIM) defines traceability as a property of a measurement, not a process, and that traceability should involve quantified uncertainties. This definition is consistent with the measurement assurance approach and shows that the concept of quantified uncertainty as a requirement for good traceability is becoming accepted globally. 

This analytical dilemma and the non-conformity of test results obtained for complex, heterogeneous measurands stimulated a movement towards standardization implemented by various international organizations such as the IFCC (Table 6). All these efforts tried to follow metrologically established rules according to the International Vocabulary of Basic and General Terms in Metrology (VIM) [38] and ISO-CEN standards (Table 7)... 

The International Organisation of Standardization (ISO) guide International Vocabulary of Basic and... 

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