After ignition, the ISO must manage time precisely since flashovers can occur within:

The correct answer indicates that flashovers can occur within 2-3 minutes after ignition. This time frame is critical for an Incident Safety Officer (ISO) to understand and manage, as flashover represents a rapid transition from localized combustion to a full-room involvement in fire, which can lead to catastrophic consequences for both personnel and property.

Understanding this timing allows the ISO to implement appropriate safety measures, conduct effective evacuations, and make informed decisions about firefighting tactics. The window of 2-3 minutes emphasizes the urgency and danger of the fire's growth and serves as a guideline for ISO training and operations to ensure the safety of all incident responders.

Previous approaches toward managing fire incidents indicated longer periods, but with advancements in research and understanding of fire dynamics, it's clear that 2-3 minutes can be critically dangerous. This knowledge supports the need for rapid assessment and action in response to a fire situation, underscoring the importance of training and awareness for all safety personnel involved.