Final answer:
In ICS, the span of control for a supervisor ideally is between 3 to 7 subordinates to maintain effective management and supervision during an incident.
Step-by-step explanation:
Within the Incident Command System (ICS), the recommended span of control for any supervisor at an incident should range from 3 to 7 subordinates. The ideal range allows a supervisor to manage resources effectively without being overwhelmed, which can compromise the incident response. While the actual range can sometimes be slightly more or less, depending on the situation, maintaining an effective span of control ensures each subordinate receives the appropriate level of supervision and the operations remain organized and cohesive.