At what point is the scene size-up considered complete?

The scene size-up is considered complete at the end of the call because this stage encompasses the initial assessment, ongoing evaluations, and adjustments throughout the entire emergency response. During the call, responders continually assess the scene for risks, hazards, and changing conditions that may affect patient care and responder safety.

Completing the scene size-up ensures that all aspects have been evaluated—including the environment, potential hazards, the nature of the incident, the number of patients, and the resources required. This ongoing process is crucial for making informed decisions that affect both patient outcomes and the safety of the rescuers involved. Thus, the ultimate indication of a complete scene size-up coincides with the conclusion of the emergency response, when all necessary assessments and actions have been completed.