What is the recommended span of control for a supervisor?

• A. 1 to 3 personnel
• B. 8 to 12 personnel
• C. 10 to 15 personnel
• D. 3 to 7 personnel

Answer: (D)

Span of control is the number of personnel a supervisor can effectively supervise at one time. In fire-service supervision, the aim is to maintain clear direction, timely communication, and strong accountability while keeping safety central. A moderate span—not too few, not too many—lets a supervisor assign tasks, monitor progress, and adjust actions quickly as conditions change. If the span is too wide, orders arrive late, misunderstandings increase, and hazards aren’t checked as well. If it’s too narrow, resources aren’t used efficiently and the supervisor becomes bogged down with micromanagement. So the best choice reflects that balanced range, supporting effective supervision, coordination, and safety.