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Erschienen in:
2021 | OriginalPaper | Buchkapitel
Assessing a Binary Measurement System with Operator and Random Part Effects
verfasst von : Stefan H. Steiner, R. Jock MacKay, Kevin Fan
Erschienen in: Frontiers in Statistical Quality Control 13
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Abstract
Consider the assessment of a binary measurement system with multiple operators when a gold standard measurement system is also available (for the assessment study). Data are collected as in a gauge repeatability and reproducibility plan for a continuous measurement system and each operator in the study measures a number of parts multiple times. We characterize the performance of the measurement system by estimating the probabilities of accepting a non-conforming part and of rejecting a conforming part. To model the data, we assume that some parts are more difficult to correctly classify than others and so choose to use random part effects. We consider two cases, modeling the operator effects as fixed or random. For each, we study a conditional and marginal model and their corresponding estimates of the parameters of interest. We also provide guidance on the planning of the assessment study in terms of the number of parts, number of operators and number of repeated measurements.