Which statement about span of control is true?

Which statement about span of control is true?

• A. A span of control of 3 to 7 is optimal, with 5 as the target.
• B. A span of control must be exactly 5 at all times.
• C. Spans of control should exceed 10 for large incidents.
• D. Span of control is only a concern for small incidents.

Answer: (A)

Span of control is the number of personnel directly supervised by one supervisor. In incident management and firefighting safety practice, keeping this number within a practical range helps ensure clear communication, timely decisions, and reliable supervision.

The statement that three to seven direct reports, with five as the target, is optimal reflects the balance you want: enough people to share workload and specialized tasks, but not so many that messages get garbled or supervision becomes unreliable. Maintaining a target around five makes it easier for a supervisor to give directions, monitor safety, and coordinate actions without delays. If the span is too small, resources are wasted and coordination overhead increases; if it’s too large, important tasks may be missed, safety could be compromised, and communication slows down.

Even on larger incidents, you stay within this principle by creating additional supervisory roles and organizing the response into branches or units, so each supervisor still keeps an effective span. Span of control matters for incidents of all sizes, not just small ones.

The other statements aren’t correct because they propose rigid or extreme requirements—being exactly five at all times, exceeding ten, or focusing only on small incidents—none of which align with the practical range that supports effective supervision and safety.