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Air traffic management personnel manage traffic flows into, out of, and through the area for which air traffic controllers in their facilities are responsible. We report on a cross-domain, artifact-based, work analysis of air traffic management that employed a hierarchical modeling methodology centered on the artifacts used in the operational setting and the information and decision-making support they provided. Many tools support traffic managers in planning for, managing, and monitoring traffic flows, but information and decision support functions are rarely integrated across tools. Thus, traffic managers spend much of their time acquiring and assimilating information from multiple displays and manually entering information into multiple systems. NextGen initiatives such as System-Wide Information Management, En Route Automation Modernization, and the Terminal Flight Data Manager represent opportunities to implement a data exchange standard that facilitates display and decision support tool integration.