What is the recommended span of control for supervisors in ICS?

• A. 1 supervisor to 10 subordinates minimum.
• B. 2 supervisors for every unit.
• C. Typically 1 supervisor to 5 subordinates, with a range of 3-7; 5 is the common target.
• D. 1 supervisor to 2 subordinates.

Answer: (C)

In ICS, span of control is about how many people or resources one supervisor can effectively manage at a time. Keeping this number in a manageable size helps ensure clear communication, quick decision-making, and safer operations.

The recommended range is typically 3 to 7, with about 5 being the common target. This balance works well for many field situations: it’s small enough to maintain direct oversight and quick contact, but large enough to avoid excessive administrative load on a single supervisor. In less complex or highly mechanical tasks, you might approach toward seven subordinates; in more complex, high-risk, or highly technical operations, closer supervision toward three to five is common.

So the choice describing roughly one supervisor overseeing five subordinates, with a practical range of three to seven and five as the frequent target, aligns best with ICS guidance. Other spreads—too many under one supervisor or too few—tend to reduce supervision effectiveness and slow down incident response.