5.1 ASTM test methods are frequently intended for use in the manufacture, selling, and buying of materials in accordance with specifications and therefore should provide such precision that when the test is properly performed by a competent operator, the results will be found satisfactory for judging the compliance of the material with the specification. Statements addressing precision and bias are required in ASTM test methods. These then give the user an idea of the precision of the resulting data and its relationship to an accepted reference material or source (if available). Statements addressing determinability are sometimes required as part of the test method procedure in order to provide early warning of a significant degradation of testing quality while processing any series of samples.
5.2 Repeatability and reproducibility are defined in the precision section of every Committee D02 test method. Determinability is defined above in Section 3. The relationship among the three measures of precision can be tabulated in terms of their different sources of variation (see Table 1).
TABLE 1 Sources of Variation
| Method | Apparatus | Operator | Laboratory | Time | |||||||||||
Reproducibility | Complete | Different | Different | Different | 會議花絮 | 2023年石油化工潤滑劑產品標準及配套方法標準宣貫會
點擊藍字關注我們2023年5月16-18日,2023年石油化工潤滑劑產品標準及配套方法標準宣貫會暨潤滑劑產業高峰論壇在無錫召開,德國斯派克分析儀器公司參加了此次盛會。...
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