[Lab] 5th independent test on HJ — 99.2% on a claimed 99.0%, and the trend is the interesting part
Title says it — 5th independent test on HJ — 99.2% on a claimed 99.0%, and the trend is the interesting part — so here is the boring supporting detail that makes it worth anything. The relevant figures are 99.2% and 99.0%, and they come from the same log I have kept the whole time. Tested three lots over a year…
A series across separate lots estimates a process. Repeat tests on one lot estimate the measurement. Both are useful and they answer different questions.
Push back: three tests on one lot is one lot. It tells you about that lot and almost nothing about the next one.
Is that the same lot as the one in the thread from last month?
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if you are going to test, test the thing you actually received
A series across separate lots estimates a process.
This is why the template has a batch field. Without it the result is about a vial nobody can identify.
Yes. Two services on the same batch is the strongest thing an individual member can produce, and it is not expensive.
split a vial across two services once and you will never argue about ground truth again
split a vial across two services once and you will never argue about ground truth again
Disagreeing with this line: that gap is ordinary variance, not a contradiction between the lab and the certificate.
Small fix — same supplier, different lot. The two rows in the log are not the same batch.
Right, and a point or two between services is ordinary. It is agreement, and every month somebody posts it as a scandal.