Attaching a physical identifier (QR code, barcode, or RFID chip) to a real piece of equipment so it can be scanned on site and matched to its record in the BIM/FM data. A facilities manager scanning a tag on a rooftop air handling unit should land directly on that exact asset's model data - warranty status, maintenance history, spec sheet - closing the gap between the physical building and its digital record that a handover package alone doesn't solve.