Which step in size-up involves making tactical decisions based on gathered information?

Making tactical decisions based on gathered information is a crucial element in the size-up process. This step involves analyzing the data collected during the initial assessment of a situation, which includes evaluating the risks, resources available, and the state of the emergency. The decisions made during this phase will inform how to proceed with the response to the emergency effectively.

In the context of emergency response, this aspect focuses on the immediate actions needed to mitigate the situation, prioritize tasks, and allocate resources efficiently. By making informed decisions based on accurate data, responders can enhance safety and effectiveness in managing the incident.

The other options represent different aspects of the size-up process, such as developing an overall plan for action or evaluating progress, but do not specifically pinpoint the tactical decision-making that is critical during the size-up.