When does the size-up of an incident typically begin?

• A. Once the first unit arrives
• B. At the completion of the incident
• C. With dispatch information
• D. After the fire is under control

Answer: (C)

The size-up of an incident typically begins with dispatch information. This is because the information received during the dispatch phase provides critical insights into the nature of the incident, including location, type of emergency, potential hazards, and available resources. This preliminary data allows the responding units to formulate a plan and expectations before arriving on scene. By understanding the situation from the very beginning, firefighters can make more informed decisions once they arrive and assess the scene further.

Beginning the size-up with dispatch information is essential because it allows incident commanders and officers to anticipate what they might face, enhancing safety and operational effectiveness. The later stages of the incident response, such as arrival on scene or when the fire is under control, focus more on tactical considerations rather than the assessment that is integral at the very start of the response.