When an automated assembly line needs to confirm the correct production batch before a critical welding operation, the Veith lot‑identification tag supplies an unmistakable visual reference that is read by the supervisory controller. The tag is mounted on the machine frame near the workpiece holder, where it stays in the line‑of‑sight of both the operator and the vision sensor. Each time a new batch is loaded, the tag is updated by the control system, instantly signalling the start of a new production cycle and preventing the accidental mixing of parts from different lots. This simple cue also drives the change‑over routine, prompting the PLC to execute the programmed sequence for tool adjustment and material feed reset. In material‑handling stations, the same tag helps the conveyor logic to route pallets to the appropriate sorting lane based on their lot code, ensuring that downstream quality checks receive the right items. By providing a clear, machine‑readable reference, the tag eliminates manual entry errors and keeps the traceability chain intact throughout the manufacturing process.