This depends on the nature of the tag itself. RFID tags are commonly used to track products throughout the production process:

http://en.wikipedia.org/wiki/Rfid#Current_uses
Product tracking
RFID use in product tracking applications begins with plant-based production processes, and then extends into post-sales configuration management policies for large buyers.

http://manufacturing.gaorfid.com/
A leading global supplier of optical filters uses RFID to track work in process in its Ottawa manufacturing facility. A truck parts plant in Mexico uses RFID to track partially finished goods through the paint process. These are just two examples of where GAO's RFID solutions are being used to improve real time visibility and quality to the overall manufacturing process.

Card containing a list of all the work operations of each item. The person performing the work signs the card after each activity. The QA person checks the signed card, inspects and signs card at defined inspection points.