| Autor: |
S. M. Jaeckel |
| Rok vydání: |
1981 |
| Předmět: |
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| Zdroj: |
Journal of the Society of Dyers and Colourists. 97:227-235 |
| ISSN: |
0037-9859 |
| DOI: |
10.1111/j.1478-4408.1981.tb03585.x |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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