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expressing measurement uncertainty, in 1978, the International Committee on Weights and Measures (CIPM) – world’s highest authority in metrology, requested the International 1978, the International Committee on Weights and Measures (CIPM) – world’s highest authority in metrology, requested the International Bureau of Weights and Measures (BIPM), in conjunction with a few national metrology laboratories and other international bodies in metrology to look into this problem.

The BIPM prepared a detailed questionnaire covering the issues involved and distributed that to 32 national metrology laboratories and to five international organizations known to have interest in the subject. Almost all agreed that it was necessary to arrive at an internationally accepted procedure for expressing measurement uncertainty and also a uniform method of combining uncertainty components into a single total uncertainty; however, a consensus was not apparent on the method of combining several components. Eleven national laboratories send their experts to the meeting convened by the BIPM. This working group developed a recommendation on statement of uncertainty in 1980, which CIPM adopted in 1981 and reaffirmed in 1986 . Before coming to the final conclusion of the efforts of the BIPM along with several other international organizations, we may discuss the procedure followed prior to it.

Source : measurement uncertainty

ISO/IEC Guide 98-3:2008

Post Author: ghaemi mohammad

This site has been established to provide updated and specialized information in the field of quality management systems and to share my experiences in the field of conformity assessment and promotion and promotion of this science.

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