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30 Seconds of Info from Paul Blackney – Principal Consultant: QAQC – Always evaluate the cause of any Certified Reference Material assay result outside of the certified three standard deviation grade range
- December 13, 2016
Always evaluate the cause of any Certified Reference Material (CRM) assay result outside of the certified three standard deviation grade range: Statistically, less than three in each 1,000 results should be outside this range, making this protocol a useful tool for identifying when to investigate further. Some QC protocols dictate that investigations are undertaken if a CRM assay result lies outside of the certified two standard deviation grade range. This protocol will leads to a lot of misplaced effort as in excess of 4% of all results should legitimately be outside this range. If significantly more than 4% of the assay results lie outside of the two standard deviation range, then further investigation is warranted.
This week’s 30 Seconds of Info comes from Paul Blackney – Principal Consultant. pblackney@snowdenoptiro.com
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