An AI data center procurement decision does not end when a buyer selects equipment, negotiates a price, and issues a purchase order. Electrical and mechanical infrastructure must still demonstrate that it meets the facility’s operating requirements before the owner accepts it for commercial use. Transformers, switchgear, uninterruptible power supply (UPS) systems, generators, cooling equipment, and control systems each require different forms of inspection and performance verification. These activities can introduce additional expenses that procurement teams may not fully capture when comparing vendor quotations. Engineering reviews, factory inspections, specialist attendance, site testing, instrumentation, documentation reviews, and corrective work can all contribute to the final cost of bringing equipment into service. Buyers who evaluate procurement solely through equipment prices risk overlooking these expenses until project delivery teams begin preparing for commissioning.