What principle dictates that each individual has only one direct supervisor?

Unity of Command is the principle that ensures each individual reports to only one direct supervisor. This principle is crucial in organizational structure, particularly in emergency services and fire departments, as it establishes a clear line of authority and responsibility. When every individual has a single supervisor, it eliminates confusion about who is in charge and helps to maintain discipline and accountability.

This principle aids in effective communication and decision-making, as it creates a straightforward command structure. Knowing who the direct supervisor is allows personnel to understand where to direct questions, report issues, and receive orders, thereby enhancing operational efficiency and coordination during firefighting operations and emergencies.

In contrast, while Span of Control refers to the number of subordinates a supervisor can effectively manage, and Chain of Command represents the hierarchy of authority within an organization, neither specifically addresses the issue of direct reporting to a singular supervisor. Delegation of Authority involves assigning tasks to subordinates but does not define how many supervisors an individual reports to. The unity of command is a foundational concept ensuring clarity and order within command structures.