Which organizational principle involves ensuring one person is in charge of a specific area or task?

The principle that involves ensuring one person is in charge of a specific area or task is unity of command. This concept emphasizes that each member of an organization should report to only one supervisor. This creates a clear line of authority and responsibility, minimizing confusion and potential conflicts that may arise if a person were to receive directives from multiple superiors. Unity of command is critical in emergency services, such as the fire department, as it enhances coordination and ensures that decisions can be made swiftly and effectively by a designated leader.

In contrast, other principles like span of control relate to the number of subordinates a supervisor can effectively manage, discipline pertains to adherence to rules and regulations, and division of labor involves dividing tasks among multiple individuals for efficiency. However, when focusing specifically on the concept of leadership and accountability within a defined area or task, unity of command stands out as the key principle.