A narrower follow-up, since the general answer is now clear:
How people are distinguishing a supplier having a bad batch from a supplier on the way out?
JenMemphis said:What actually changed my mind was the point about waiting for a trend instead of reading a single measurement, which is embarrassing in hindsight and…
Pushing back on JenMemphis here. The counter-case has not been addressed. Somebody upthread described the situation that does not fit, and the thread moved on rather than engaging with it, which is the failure mode this board is supposed to avoid.
JenMemphis said:What actually changed my mind was the point about waiting for a trend instead of reading a single measurement, which is embarrassing in hindsight and…
Agreed on the substance. I would put less weight on the timescale, because two months of anything is not enough to distinguish a trend from a wobble.
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Browse GL BiochemJenMemphis said:What actually changed my mind was the point about waiting for a trend instead of reading a single measurement, which is embarrassing in hindsight and…
Bookmarking. The distinction being drawn above is the one nobody else makes.
Clinical perspective, offered as context rather than as advice. Whatever the answer turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, and invite the correction. That is slower than asserting, and it is the only version that survives being wrong.