Manageable Span of Control refers to the number of individuals a supervisor can manage effectively.

• A. Hours a supervisor works
• B. The distance between incident facilities
• C. Number of supervisors required for an incident
• D. Number of individuals one supervisor can manage effectively

Answer: (D)

Span of control is the number of individuals a supervisor can supervise effectively. A manageable span of control keeps supervision clear, communications direct, and decisions timely, which is crucial in incident management where safety and coordination depend on staying within a workable load. Typically, practical ranges are around three to seven direct reports, with five often considered ideal, though exact numbers vary with task complexity and risk. This concept focuses on supervisory workload, not hours worked, distance between facilities, or the total number of supervisors needed. So, the description that matches the idea is the number of individuals one supervisor can manage effectively.