What is the first action step in the command sequence during an incident?

The first action step in the command sequence during an incident is size-up, which involves the Incident Commander or responding units assessing the situation to gain a comprehensive understanding of the incident dynamics. This initial evaluation includes gathering information about the type of incident, the number of victims involved, potential hazards, available resources, and the operational environment.

Conducting a size-up is crucial as it forms the foundation for effective decision-making and strategy development. It allows the Incident Commander to identify priorities, develop an action plan, and allocate resources appropriately. In essence, a thorough size-up informs all subsequent actions, ensuring that the response is well-coordinated and tailored to the specific circumstances of the incident.

While the other actions such as Planning Resource Deployment, Staffing the Command Post, and Assessment of Damage are important steps that follow in the command process, they cannot be effectively executed without first understanding the complete scene through a proper size-up.