Increases in technological capability permit us to obtain more information with improved accuracy from the systems and actors in the NAS. Collaborative Decision Making is a philosophy of redistributing information such that airspace users and service providers can act cooperatively to solve problems in areas such as flow control, and ground or weather delays. Designers are creating new tools to access this information and provide it to the users and ATC. We are concerned with the controller interface to this information and its incorporation of these new tools. We recommend a human-centered approach to the development of an effective interface.