The five facts an auditor asks for
01What band was the unit supposed to be in?
The required range belongs to the asset, not the memory of whoever is on shift. It should be registered once — +2 °C to +8 °C, −18 °C, whatever the product needs — and read from the record, not re-argued during the audit.
02When did the temperature leave the band?
A start timestamp for every excursion. Not 'that weekend' — a datetime the log can point to.
03How long was it out?
Minutes out of band are the number that gets compared to product tolerances and customer agreements. Cumulative duration matters as much as the single worst event.
04How far out did it get?
The worst value reached during the excursion, not the average. Severity is what separates a nuisance from a product-integrity event.
05What did you do — and when was it back?
The corrective action and the recovery timestamp close the loop: door left open vs compressor failure vs power cut are different stories, and the record should tell which one happened.
What does “out of band” mean?
Why recovery time is the hidden metric
Two excursions can look identical on a chart and mean very different things. Ten minutes two degrees warm during a door-open delivery is a different event from four hours a degree warm overnight. Duration × severity decides whether product is suspect; recovery time says how the operation responds. Aggregating all three over a month is what turns raw temperature data into a compliance position — and it is what a summarized “all clear” email can never reconstruct after the fact.
Keep the evidence, not the summary
Retention rules vary by jurisdiction, product and customer agreement — food traceability timelines (such as the FDA's FSMA 204 requirements for foods on the Food Traceability List) have moved more than once, so check current dates.
How Cryovo produces this
Upload the logfile CSV. Cryovo registers each asset's band, detects every out-of-band excursion, and keeps the band, start, duration, worst value and recovery on the record — the five facts, answered before anyone asks.
General information, not legal or compliance advice for your jurisdiction. New to the vocabulary? See the Help page and the glossary.