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Standard Practice for Laboratory Bias Detection Using Single Test Result from Standard Material
Automaticky preložený názov:
Štandardné praktiky pre laboratórne Bias detekcie s použitím jedného testu Výsledok od štandardnej materiál
NORMA vydaná dňa 15.6.2013
Označenie normy: ASTM D6617-13
Poznámka: NEPLATNÁ
Dátum vydania normy: 15.6.2013
Kód tovaru: NS-35905
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
accepted reference value, bias, check standard, consensus, power of test, probability of bias detection, type I error, type II error, ICS Number Code 19.020 (Test conditions and procedures in general)
Significance and Use | ||||||
4.1 Laboratories performing petroleum test methods can use this practice to set an acceptable tolerance zone for infrequent testing of CS or CCS material, based on ε, and a desired Type I error, for the purpose of ascertaining if the test method is being performed without bias. 4.2 This practice can be used to estimate the power of correctly detecting bias of different magnitudes, using the acceptable tolerance zone set in 4.1, and hence, gain insight into the limitation of the true bias detection capability associated with this acceptable tolerance zone. With this insight, trade-offs can be made between desired Type I error versus desired bias detection capability to suit specific business needs. 4.3 The CS testing activities described in this practice are intended to augment and not replace the regular statistical monitoring of test method performance as described in Practice D6299. |
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1. Scope | ||||||
1.1 This practice covers a methodology for establishing an acceptable tolerance zone for the difference between the result obtained from a single implementation of a test method on a Check Standard (CS) and its ARV, based on user-specified Type I error, the user-established test method precision, the standard error of the ARV, and a presumed hypothesis that the laboratory is performing the test method without bias. 1.2 For the tolerance zone
established in 1.3 This practice is intended for
ASTM Committee D02 test methods that produce results on a
continuous numerical scale.
1.4 This practice assumes that the normal (Gaussian) model is adequate for the description and prediction of measurement system behavior when it is in a state of statistical control.
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