To support network roaming-where devices maintain connectivity while moving throughout a building-evaluating Wi-Fi coverage and capacity is essential. This involves assessing signal strength, bandwidth availability, and the ability of the wireless network to handle multiple devices seamlessly. Proper placement and power of access points ensure uninterrupted service. Number of devices per user (option A) is unrelated to roaming. Adequate access points per device (option C) is a specific detail within coverage and capacity, not the overarching aspect. Sources of interference (option D) is a factor to consider but secondary to overall coverage and capacity. The Apple Platform Deployment Guide stresses Wi-Fi infrastructure evaluation for mobility needs.