What is the first item in the command sequence for an incident response?

The first item in the command sequence for an incident response is the size up. This crucial step involves assessing the current situation and gathering information about the incident, including its scope, hazards, and the resources already on the scene. A thorough size up allows the incident commander and responders to make informed decisions about the necessary actions, such as identifying risks to personnel, determining resource needs, and establishing incident objectives.

Understanding the conditions of the incident at the outset is vital to effective management and response. It sets the stage for establishing priorities, defining objectives, and coordinating efforts among response teams. Without a proper size up, further plans may overlook critical factors that affect outcome efficiency and safety.