Third-party testing: difference between revisions
Diff·revision 9 → 10·19:40, 27 Sep 2024
Difference between revision 9 and revision 10 of Third-party testing. 5 lines changed; the page grew by 754 bytes.
| Revision 9 — 20:38, 17 Sep 2024 ImageReuseIris (talk) add the turnaround time the service publishes 3,553 bytes +140 | Revision 10 — 19:40, 27 Sep 2024 GroupBuyGalen (talk) unpipe a link that did not need piping 4,307 bytes +754 | ||
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| 29 | A report addressing only the second of these — which many do — leaves the first and third open. A specification is judged by which attributes it covers, not by how favourable the covered ones look.{{r|ich_q6b}} | 29 | A report addressing only the second of these — which many do — leaves the first and third open. A specification is judged by which attributes it covers, not by how favourable the covered ones look.{{r|ich_q6b}} |
| 30 | 30 | ||
| + | 31 | == Sampling and representativeness == | |
| + | 32 | A sample submitted by a purchaser is a sample of one vial from one order. If a supplier ships from a single lot, the vial may fairly represent it; if a shipment draws from several lots, or if the vial submitted was selected rather than drawn at random, it does not.{{r|reports}} | |
| + | 33 | ||
| + | 34 | [[Blind sampling|Blind sampling]] — in which the laboratory does not know the origin of the sample and the supplier does not know a sample has been drawn — removes one class of bias. A [[Chain of custody|chain of custody]] documenting who held the material between purchase and analysis removes another. Reports that arise from neither are still informative, but they are informative about a narrower thing than they appear to be. | |
| + | 35 | ||
| 31 | == References == | 36 | == References == |
| 32 | {{reflist}} | 37 | {{reflist}} |