title: Precision estimates produced by specially-designed ruggedness tests compared with those derived from collaborative trials, in relation to estimation of measurement uncertainty.
abstract: We have compared the reproducibility precisions provided by collaborative trials with precisions obtained from ruggedness tests specially designed to try to simulate between-laboratory variation. We found that the ruggedness tests underestimated the reproducibility variability consistently for those analytical methods requiring empirical calibration. The ruggedness tests provided on average a precision merely comparable with repeatability precision. This finding has implications for the estimation of uncertainty.
authors.affiliation: School of Biological and Chemical Sciences, Birkbeck College (University of London), Gordon House, 29 Gordon Square, London, UK WC1H 0PP.
authors.forename: Michael
authors.initials: M
authors.lastname: Thompson
authors.forename: Stephen
authors.initials: S
authors.lastname: Guffogg
authors.forename: Stephen
authors.initials: S
authors.lastname: Stangroom
authors.forename: Paula
authors.initials: P
authors.lastname: Osborne
authors.forename: Pauline
authors.initials: P
authors.lastname: Key
authors.forename: Roger
authors.initials: R
authors.lastname: Wood
mesh_terms: D005504:Food Analysis / Q000379:methods*; D007753:Laboratories; D015203:Reproducibility of Results