Which principle emphasizes having a single person in charge during an incident?

The principle that emphasizes having a single person in charge during an incident is unity of command. This principle is crucial in emergency management as it establishes a clear hierarchy and responsibility, ensuring that all personnel involved in the response follow the directions of one designated leader. Having one individual in command minimizes confusion and overlap of authority, which can occur when multiple leaders try to direct actions simultaneously. This clarity is essential during emergencies, where timely and coordinated responses are vital to effectively manage the situation and allocate resources efficiently. By adhering to unity of command, organizations can maintain order and communicate effectively among teams, leading to a more organized approaching to crisis management.