Related Experiment Videos
Precision estimates produced by specially-designed ruggedness tests compared with those derived from collaborative
Michael Thompson1, Stephen Guffogg, Stephen Stangroom
1School of Biological and Chemical Sciences, Birkbeck College (University of London), Gordon House, 29 Gordon Square, London, UK WC1H 0PP.
The Analyst
|January 23, 2003
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.