What is the term used for the initial investigation of an incident by first responders?

The term "size up" refers to the initial assessment conducted by first responders when they arrive at the scene of an incident. This process involves evaluating the situation to gather essential information about the environment, the nature of the emergency, any hazards present, and the needs of potential victims or bystanders. The size-up process is crucial for making informed decisions on how to approach the incident safely and effectively.

During the size-up, responders may look for signs of danger, determine the resources required, and establish priorities for actions to be taken. This comprehensive assessment creates a mental picture of the situation and guides the subsequent steps in the emergency response, ultimately influencing the overall strategy for managing the incident.

Understanding size-up is fundamental for first responders because it sets the stage for effective action and ensures that safety protocols are adhered to during the response. Without a thorough size-up, responders could overlook critical factors that may complicate or endanger the operation.