Building a Four-Layer Data Model for FSMA 204 Cold Chain Traceability

The FDA just pushed the FSMA 204 compliance deadline from January 2026 to July 2028. If you work anywhere near food supply chains or cold chain IoT, you've probably heard the collective sigh of relief. But here's the thing I keep seeing from the hardware side: the delay isn't a sensor problem. It's a data model problem. Companies have thermometers everywhere. What they don't have is a schema that maps sensor readings to the specific Critical Tracking Events (CTEs) and Key Data Elements (KDEs) th