When updating a preplan, why is it important to check the occupancy?

• A. Occupancy of a building may change over time.
• B. Occupancy never changes after permit issue.
• C. Occupancy is fixed by the original plan.
• D. Occupancy is not relevant to response.

Answer: (A)

Occupancy shapes how responders approach a scene because it tells you how many people are inside, who they are, and how they will move or need assistance during an incident. Knowing the current occupancy helps determine life-safety priorities, potential hazards, and the most effective tactics. It also influences egress planning, the number of exits to rely on, and the resources you’ll need to manage occupants safely, such as rescuers, lighting, and communication.

Buildings can change use or tenants over time—an office space becoming a mixed-use facility, a warehouse converted to another operation, or a gym adding new programs—so the actual occupancy can differ from what was originally planned. If you don’t verify the current occupancy when updating a preplan, you risk underestimating or overestimating the risk, which can lead to insufficient or misallocated resources and unsafe or inefficient response decisions.

The other statements imply that occupancy is fixed or irrelevant, which isn’t true and would undermine a safe, effective response.