Protecting a Cold Chain: Lessons from a Realistic Supply Chain Scenario
A cold chain is a supply chain in which products are maintained within a specific temperature range at every stage -- from production through storage, transportation, and delivery. Vaccines, pharmaceuticals, fresh produce, seafood, dairy products, and other temperature-sensitive products require cold chain management. A break in the cold chain -- a period in which the product is exposed to temperatures outside its required range -- can render the product unsafe, ineffective, or unmarketable.
In 2022, with pharmaceutical and vaccine supply chains under public attention following the COVID-19 pandemic, and with food security concerns heightened by supply disruptions, cold chain integrity is a more prominent topic than in previous years. Here is a realistic scenario that illustrates where cold chains fail and what effective management looks like.
The Scenario: A Pharmaceutical Cold Chain Failure and Recovery
A hospital pharmacy receives a shipment of temperature-sensitive biologics. On arrival, the pharmacy team checks the temperature logger included in the shipment and finds that the product was exposed to temperatures above the maximum threshold for 4 hours during transit. The failure occurred when a refrigerated truck was delayed at a border crossing and its generator ran out of fuel.
The pharmacy quarantines the shipment and initiates the supplier's cold chain deviation protocol. The deviation report documents the time, duration, and extent of the excursion. The manufacturer's stability data indicates that the product is unaffected by a single excursion of this duration at this temperature -- the product can be released. The incident report is filed and the delivery carrier is required to provide a corrective action plan.
The Lessons from This Scenario
Temperature logging is necessary but not sufficient. The pharmacy had a temperature logger in the shipment -- which is why they detected the excursion. But detection after delivery is not prevention. Effective cold chain management includes real-time temperature monitoring with alerts during transit, not just logging for review on arrival.
Deviation protocols must be in place before a deviation occurs. The pharmacy was able to respond effectively because the supplier had a documented cold chain deviation protocol with stability data that could be referenced to make a release decision. Organisations that do not have this documentation in place face ambiguity at the worst time.
Root cause investigation must follow every significant deviation. The generator fuel issue was a systemic failure -- not an isolated incident. Requiring the delivery carrier to provide a corrective action plan, and verifying its implementation, is part of effective supply chain quality management.
Supplier qualification should include cold chain capability assessment. The carrier that allowed the generator to run out of fuel had passed a standard supplier qualification process that did not include cold chain-specific requirements. Qualifying cold chain suppliers requires cold chain-specific criteria.
XNM supports public-sector and capital-project organisations in building supply chain risk management and quality assurance capability. Reach out to XNM's procurement, sourcing & contract management team to discuss supply chain quality management for your organisation.