Which factor dictates the coordination between controllers about runway operations?

The coordination between controllers regarding runway operations is primarily dictated by the facility directive. A facility directive is a set of instructions and guidelines specific to a particular air traffic control facility, detailing operational procedures, safety protocols, and expectations for communication among controllers. This directive ensures that all controllers are on the same page regarding the handling of aircraft, including runway use, thus promoting safe and efficient operations.

While weather conditions, flight plan regulations, and traffic volume are certainly important factors influencing runway operations and may affect how controllers manage the airspace, they do not establish the fundamental communication protocols and procedures that are outlined in the facility directive. The directive serves as the backbone for day-to-day operations, ensuring consistency and coordination among all members of the control team.