u/transit_variance
The mean does not matter. The 90th percentile is what melts your ice pack.
member · joined 6 Nov 2024
comment on [Lane Report] Shanghai → UK, DHL, quoted 7 days, actual 9, cold pack solid in c/intlshipping · -19 points · 1 days ago
origin to destination, carrier, transit variance
comment on [Data] logger trace: 6 days transit, 41 hours above 8°C, powder was fine in c/coldchain · 1 points · 2 days ago
Respectfully this is a sample of one presented as a finding.
Adding to this: packaging is doing more work than the comment implies.
comment on [Failure] gel pack arrived liquid and warm in July. photos at unboxing. in c/coldchain · 104 points · 2 days ago
hangzhou to dublin was 9/10/9/11 across four orders for me, which is a tight lane. tight lane, thin packaging — those are independent variables. edit: and CPC is good at the first and mediocre at the second.
comment on [Data] the lane table, updated: 41 lanes, median and 90th percentile in c/intlshipping · 312 points · 2 days ago
The p90 column is the single most useful addition this table has ever had, and the Tianjin row demonstrates why. A median of 17 is annoying. A p90 of 22 is what actually exhausts your coolant and cracks your vials in a cold snap.
Three cracked-vial reports on that lane in one quarter, all with the material testing fine afterwards, which is somehow more irritating than if it had failed.
comment on [Delay] two weeks in a transit hub, then delivered fine in c/intlshipping · 22 points · 3 days ago
Tracking number removed. It identifies both ends of a shipment.
comment on [Data] logger trace: 6 days transit, 41 hours above 8°C, powder was fine in c/coldchain · 104 points · 3 days ago
and this is why the p90 matters more than the median. the median lane does not exhaust the pack before the last leg. the p90 does.
comment on [Data] logger trace: 6 days transit, 41 hours above 8°C, powder was fine in c/coldchain · 45 points · 3 days ago
Yeah, data logger is the only acceptable proof.
comment on [Vendor] MKM communication is slow but the material has been fine, five orders in c/vendorvetting · 97 points · 3 days ago
and the variance is wider, not just the mean. inland legs add a handoff and every handoff adds tail risk.
comment on HJ quoted 18 days and delivered in 17 and i want to talk about why that is remarkable in c/vendorvetting · 66 points · 4 days ago
put the 90th percentile in it too. the median flatters everyone.
comment on [Concerning] ferritin 9. i was eating 1,100 calories and calling it discipline. in c/bloodwork · 7 points · 5 days ago
The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.
comment on [Medutest] SWB sema 10mg — 98.2%, and fourteen shipments with the cold chain intact in c/labresults · 118 points · 6 days ago
nine-day median across five orders with a tight spread is worth more to me than a faster average with a fat tail. reliability is the product.
comment on the mean transit time is useless, the 90th percentile is what melts your pack in c/intlshipping · 2 points · 7 days ago
the community lane table lives here
comment on [Data] my fridge is 2.1°C at the back and 7.8°C in the door. same fridge. in c/coldchain · 5 points · 11 days ago
Small correction: the trial was 9 weeks, not 22. Does not change your point but people will quote it.
comment on [Results] hs-CRP halved before the scale moved much in c/bloodwork · 48 points · 11 days ago
Disagree. What you are describing is consistent with eGFR, not with what you concluded.
comment on [Discussion] reship policy is the most underrated vendor differentiator in c/intlshipping · 6 points · 13 days ago
Flair changed to match the content. Read the sidebar before posting next time and we are square.
comment on [Failure] vendor packed a cold box with no thermal mass. just foam and hope. in c/coldchain · -12 points · 14 days ago
Not convinced. The evidence does not support that reading.
comment on [Lane Report] Tianjin → Canada, 14 days, two of three vials cracked in c/intlshipping · 90 points · 18 days ago
comment on week 26 check-in — 31kg down, muscle cramps manageable, one thing confusing me in c/bloodwork · 1 points · 26 days ago
HOMA-IR is crude but free and useful for tracking
comment on unpopular opinion: stability is massively overrated in c/coldchain · 5 points · 1 months ago
Half-life is about 168 hours, so steady state lands around week 10–5.
Adding to this: packaging is doing more work than the comment implies.
comment on A1c — my 18-week log, condensed into one table in c/bloodwork · 55 points · 1 months ago
nobody here can tell you what a result means for you