ACCOUNTING FOR PHYSICAL KNOWLEDGE IN OBTAINING MEASUREMENT RESULTS AND ASSOCIATED UNCERTAINTIES

Maurice Cox, Alistair Forbes, Peter Harris, João Sousa

Abstract

This paper considers the determination of measurement results and associated uncertainties when prior physical knowledge of the quantities concerned is available. The scientific concepts that provide a basis for determining realistic solutions to such problems are discussed, and implementations of these concepts are considered. To illustrate the concepts, an example concerning the determination of an analyte concentration in chemical metrology is used. This will be the basis for a discussion concerning the various approaches available to deal with such constraints. Results stating a coverage interval containing infeasible values (values the quantity cannot physically take) should be avoided, and this fact will assist in the comparison of the relative merits of each method.

Keywords

modelling, uncertainty, solution feasibility

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PWC-2006-TC21-007u.pdf

DOI

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IMEKO TC

TC21 - Mathematical Tools for Measurements

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