log the boring ones
#test-results 2025-10-18
Saturday15 messages4 participantstimes are UTC
Highlights from this day
- area_percent — unrelated but whats the underfill rate people are actually seeing 20:58
- ms_ms_mira — update from 10 months ago: retested the same supplier, result came back better, logged both, ask me again in a month 21:11
- split_the_cost — what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern 21:53
- split_the_cost — post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later 21:54
my vial assayed under label but the purity was fine, which matters more
anyone had a result they think was a lab error rather than a bad vial
follow up how do you post a result so it is actually useful to somebody in a year
one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally
how do you separate batch variance from supplier variance
unrelated but whats the underfill rate people are actually seeing
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the honest limits: hobby chain of custody is weak and any result here should be read with that in mind
update from 10 months ago: retested the same supplier, result came back better, logged both, ask me again in a month
i test roughly every tenth vial. it is a sampling strategy, not paranoia, thats one data point
the widest spread in my data is about 2.6 percentage points across five lots from one supplier
*VendorInvestigate not the other one
weigh it first
🧪12🎉13
what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern
post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later