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Safely Propagating Conformity Statements


Illustration for weighing a long vehicle according to a simultaneous weighing procedure. wikipedia.org

Statements of conformity are widespread to ensure that a measuring instrument conforms, e.g., to tolerance intervals. When linearly combining quantities, however, that are each measured with a conforming instrument according to ISO 17025, existing guidance to arrive at a conformity statement is often inapplicable or requires disproportionate efforts. Recent research identifies typical settings which lead to simple, provable decision rules for stating conformity for linear combinations of quantities, for which conformity statements are available. These new decision rules are risk-based, comply again with ISO 17025 and the GUM documents, and use information that is available in the decision rule of the inputs. The need and applicability of this research is illustrated for weighing procedures of long vehicles that are to fulfill legal requirements.


Related publications: 

K. Klauenberg, J. Greenwood and G. Foyer “Propagation of conformity statements in compliance with the GUM and ISO 17025”. Metrologia, 60(5), 054004, 2023. DOI: 10.1088/1681-7575/acf3eb

G. Foyer, K. Klauenberg and J. Greenwood “Propagation of conformity statements in weighing procedures for law enforcement”. Accepted for OIML Bulletin, LXIV (4), 2023.


Contact: Opens local program for sending emailKaty Klauenberg (8.42), Opens local program for sending emailGisa Foyer (1.14)