What is the final step after all passengers have evacuated the aircraft?

The final step after all passengers have evacuated the aircraft involves commencing crowd control procedures. This action is critical to ensure the safety and security of both the evacuated passengers and the emergency responders. After evacuation, managing the crowd helps to prevent panic and ensures that passengers are accounted for and directed to a safe area away from the aircraft. It plays a significant role in maintaining order during what can be a chaotic situation.

While it might seem logical to confirm with the captain or search for missing passengers, these actions typically occur earlier in the emergency response sequence, prior to fully managing the post-evacuation situation. Closing the doors of the aircraft is not a priority since the focus should be on the safety and management of passengers outside the aircraft. Thus, starting crowd control is the most appropriate and necessary procedure to follow immediately after evacuation.