Which key element of incident size involves constant evaluation and flow of information for command personnel?

The key element of incident size that focuses on constant evaluation and flow of information for command personnel is ongoing risk evaluation. This process is critical in managing any incident as it ensures that decision-makers have the most current and relevant information regarding safety risks, the dynamics of the incident, and the effectiveness of the response efforts.

Ongoing risk evaluation allows command personnel to analyze evolving situations continuously, assess the potential impacts on responders and the public, and adjust strategies accordingly. This real-time assessment helps in making informed choices about resource allocation, operational tactics, and prioritization of actions to mitigate risks and manage the incident effectively.

In contrast, resource management focuses more on the allocation and use of resources rather than the constant assessment of risks. Immediate action planning involves quick decision-making for initial response measures but doesn't emphasize the ongoing nature of risk assessment. Post-incident analysis occurs after the incident has concluded and is focused on evaluating what occurred, making it distinct from the real-time evaluations needed during an incident.