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Testing for Compliance with a Performance Specification
Author(s) -
Jaeckel S. M.
Publication year - 1981
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1981.tb03585.x
Subject(s) - quality (philosophy) , control (management) , computer science , test (biology) , advice (programming) , statistical hypothesis testing , statistics , significant difference , reliability engineering , mathematics , artificial intelligence , engineering , paleontology , philosophy , epistemology , biology , programming language
Statistical data from an inter!aboratory trial of a new test method are applied to yield advice on quality–control criteria. It is shown how repeatabilities and reproducibilities of the test can be converted into critical differences for comparison with a specified fastness rating. Adding the right critical difference to the rating tells one what result to lay down as a quality–control target for a defined, high probability of the bulk goods conforming to the specified rating. The difference between ‘two–tailed’ and ‘one–tailed’ limits is explained. The stages in the procedure described include: correlating critical difference with fastness rating; comparing limits for different numbers and types of tests and assessors; suggesting the most useful procedures; deriving the minimum results needed to satisfy different specifications for the particular test; and explaining the related appendix to the test method on precision for quality control. Information is given on ways to alter limits according to particular needs.