The ATCSCC talks with all CDM members every two hours.
Chicago Approach can coordinate a TMI with the ATCSCC and Chicago Centre, requiring that Center feed the airplanes to Approach spaced by thirty miles.
Via CDM conference calls, the ATCSCC can propose a new solution--a Ground Delay Program (GDP)--and include it in their operational plan.
The ATCSCC can chop the throttle to idle and shut down traffic flow at the source.
While the ATCSCC is the focal point for all traffic management decisions, ground stops often originate at lower level facilities.
Both ATC facilities then conference call with Miami Center, possibly neighboring Jacksonville Center, the CDM, and the ATCSCC to organize a proper national ground stop.