What we have written on the cold chain107 / 154

Make detection time, notification owner and backup contact visible in the incident record.

Align clocks, mark route events and narrow the excursion interval by sensor location.

Use accumulated time-temperature exposure for process analysis; use approved evidence for product decisions.

Log an alarm as an event; base product suitability on specification, time and location evidence.

A cold chain break is a product leaving its own temperature range and staying out long enough to affect quality or safety. A brief ripple is not a break, and the definition is written per product.

Define the failure report, load details, logger and alternate delivery decision with named owners in advance.

A one-week count records how long each opening lasted and why it happened. That gives you the door's share of refrigeration load, product temperature and round time on your own route.

Compare actual route and wait records with product requirements, and document who decides when delays occur.

Track loading, parking, overnight data and morning receipt as one chain, then validate the plan with a route trial.

An insulated container keeps hot food hot but does not heat it; the temperature at arrival depends on the departure temperature and the journey time. The FDA Food Code sets the limit at 57 °C or above.

Insulation slows heat transfer; verify your setup with product instructions, weather profile and measurements.

Where the ice sits points to its cause. Here is how much water one door opening can bring in, and what to check at the door edge, the base and the load.