Cold Chain
Definition
The cold chain is a temperature-controlled supply chain that keeps perishable or temperature-sensitive products, such as food, pharmaceuticals, and vaccines, within a specified temperature range from origin to final delivery, without interruption.
In Practice
A cold chain links refrigerated production areas, reefer trucks and containers, cold storage warehouses, and temperature-controlled last-mile delivery, with monitoring at every handoff. Products run in defined bands, commonly frozen at minus 18 degrees Celsius, chilled at 2 to 8 degrees for pharmaceuticals and fresh food, or controlled ambient at 15 to 25 degrees.
The defining feature for planners is that failures are irreversible: a temperature excursion cannot be undone, only detected and the product quarantined or destroyed. That makes handoffs the danger points, dock dwell, precooling discipline, and equipment setpoints all need verification, and data loggers or IoT sensors provide the audit trail regulators and customers demand. Cold capacity is also scarcer and pricier than dry, so lanes need booking earlier.
For example, a vaccine distributor ships 2-to-8-degree product in qualified insulated shippers with data loggers, reviewing each logger file at receipt before releasing stock to inventory.
Related Calculators
Related Terms
A carrier is a company that physically transports freight, such as a trucking company, ocean line, airline, or railroad. Carriers contrast with intermediaries like brokers and forwarders, who arrange transport but do not operate the equipment.
Transit TimeTransit time is the elapsed time between a shipment leaving its origin and arriving at its destination. It is a core component of total lead time and a key input to inventory and delivery planning.
Distribution CenterA distribution center (DC) is a facility designed to receive goods in bulk and rapidly redistribute them to stores, customers, or other facilities. Unlike a long-term storage warehouse, a DC is optimized for throughput and order fulfillment.
Last Mile DeliveryLast mile delivery is the final leg of a shipment's journey, from a local depot or distribution center to the end customer's door. It is typically the most expensive and operationally complex portion of the delivery chain.