What aspect of data center planning occurs first?

Logical design, involving network topology and server configurations, follows the establishment of the physical infrastructure.

Physical design, encompassing site selection, building construction, power, cooling, and cabling infrastructure, is the foundational aspect of data center planning that must occur first, as these physical constraints dictate subsequent logical designs and operational capabilities.

An audit is a review of existing systems or plans, typically occurring after design and implementation, or as part of a recurring compliance check.

Policy revision involves updating organizational rules, which are informed by the data center's design and operational capabilities, and would not precede the fundamental physical planning.