Correct!

The situation is not consistent with the NIMS Management Characteristic of Manageable Span of Control. The Operations Section Chief could have established Groups to accommodate the increased number of personnel.

The optimal span of control for incident management is one supervisor to five subordinates; however, the 1:5 ratio is only a guideline and effective incident management often calls for different ratios.

When a supervisor's span of control becomes unmanageable, they can assign subordinate supervisors or redistribute subordinates to manage portions of the organization in order to regain a manageable span of control.

Span of control can change based on:

Type of incident
Nature of the task
Existing hazards and safety factors
Distances between personnel and resources

The organizational chart linked below shows how the Operations Section Chief can maintain an effective span of control.