1. EPI-DCOS® (Data Centre Operations Standard), Version 3.1, 2021. Section 8.3, "Asset Management," specifies that assets must be registered and tagged upon receipt at the data center's receiving area, which corresponds to the unpacking stage.
2. IT Asset Management (ITAM) principles, as outlined in university-level IT management courses, emphasize that asset tagging should be part of the receiving process to establish control from the beginning of the lifecycle. (e.g., Carnegie Mellon University, "IT Asset Management Best Practices").