Data associated with supply chain events for a manufactured assembly is automatically stored. In preferred embodiments the supply chain events for the manufactured assembly are stored on an RFID tag attached to the assembly as it travels through the supply chain to insure the data concerning the assembly is readily available and not separated from the assembly. In other embodiments, the supply chain events or characteristic data is stored on the RFID tag in a hierarchical structure beginning with the original state of the assembly and with additional entries for each step in the assembly process. In other embodiments, as the product undergoes rework, conversion to a different assembly, or personalizations, the new state of the assembly is stored in the RFID tag. In other preferred embodiments, other information is also stored on the RFID tag such as country of origin, failure data, cycle times and a quality status indicator.