Grubbs-Type Estimators for Reproducibility Variances in an Interlaboratory Test Study

Article

Deutler, Tilmann   (1991, ASQC)   University of Mannheim, Germany

Journal of Quality Technology    Vol. 23    No. 4
QICID: 11310    October 1991    pp. 324-335
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Article Abstract

The well-known model of Grubbs, which is based on repeatability conditions, is generalized to reproducibility conditions in an interlaboratory test study. ANOVA estimators are developed for the repeatability and reproducibility variances of each procedure as well as for the variability within and between laboratories. The paper gives a solution to a problem which often occurs in practice, but which cannot be tackled by the standard model of ISO 5725.

Keywords

Interlaboratory comparisons,Estimation,Repeatability and reproducibility studies (R&R)


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