What is the first stage of size-up according to established practices?

The first stage of size-up in fire response is crucial as it sets the foundation for the entire operation. Pre-Incident refers to the process of gathering information and preparing prior to actually responding to an incident. This stage involves analyzing data related to the location, type of structure, occupancy hazards, and historical issues with similar incidents in the area.

During this stage, responding units may review existing pre-plans, which can inform tactical decisions once they arrive on the scene. The emphasis here is on anticipation and preparation, allowing firefighters to formulate strategies based on known conditions before they face the dynamic environment of an actual fire situation. Recognizing the details that can be gathered before an incident occurs is essential for effective size-up and ultimately for the safety and success of the operation.