For the window system in STM, three types of tags were attached to the inside surface of the metal frame.
The metal tag is suitable for the window system. In addition, a small tag (e.g. 30 × 21 × 2 mm) is attached inside the window frame.
The small metal tag inside STM provides integration between T1 and T3 among RFID checkpoints as shown in Table 1.
The tag attached at the manufacturer (T1) can show the changing contexts of the material throughout the entire construction lifecycle.