What is Span of Control in ICS and provide a typical example?

• A. The number of resources or personnel supervised by a supervisor; typically 3-7, often five; example: one captain supervising five firefighters.
• B. The number of incidents an officer can handle at once.
• C. The number of safety checks per hour.
• D. The total number of zones in HazMat.

Answer: (C)

Span of control is the number of resources or personnel directly supervised by a single supervisor during an incident. In ICS, a practical range is 3 to 7, with five being a common balance between manageable supervision and efficient use of resources. For example, one captain supervising five firefighters illustrates a typical span of control in action. This concept matters because it affects how clearly commands are given, how well information is communicated, and how safely tasks are coordinated; too many direct reports can overwhelm a supervisor, while too few can waste personnel.

The other ideas describe different things: handling multiple incidents at once refers to workload capacity, not how many people a supervisor can oversee; safety checks per hour measure activity rate rather than supervisory span; and HazMat zoning is about incident geography or categorization, not the supervision count.