What is the definition of size-up in the context of incident management?

Size-up, in the context of incident management, refers to the appraisal of the magnitude or dimensions of an event or incident. This process involves gathering and analyzing information about the incident's scope, hazards, and potential impact, allowing incident commanders to make informed decisions regarding the necessary resources and response strategies.

By determining the size and scale of the incident, responders can prioritize actions, allocate resources effectively, and ensure that they are prepared for changing conditions. This is fundamental to managing incidents effectively, as a thorough size-up sets the foundation for a focused and efficient response effort. The approach to size-up is critical because it helps to create a clear picture of the situation on the ground, which is essential for achieving operational success and ensuring safety for all involved.