The Span of Control in management refers to the number of subordinates that a manager (Head Nurse) can effectively and efficiently supervise.

Factors affecting optimal span of control:

• Complexity of tasks (narrower span for complex work)
• Geographic dispersion of staff
• Similarity of tasks being performed
• Manager's competence and experience
• Availability of support staff

Generally, a span of 5–8 subordinates is considered optimal in nursing settings. Too wide a span leads to poor supervision; too narrow a span creates unnecessary administrative layers.