Temperature-controlled logistics is not really about temperature. It is about how fast somebody with authority finds out that the temperature moved.
Why per-minute logging changes the maths
A fifteen-minute logging interval sounds thorough until you work out what it hides. Most passive packaging holds for hours, so a genuine breach is rarely instantaneous — but the window in which intervention is still cheap is measured in minutes, not hours.
“The window in which intervention is still cheap is measured in minutes.”
SkyQuest cold-chain operating standard, §4.2