The original DARPA STARS project had a number of objectives as it sought to infuse leading edge software engineering technology into the Department of Defense (DoD). One of those objectives was to develop well-defined processes that were not only repeatable, but practical and effective in developing software that was better, faster and cheaper. The Air Force STARS/SCAI demonstration project developed a process that combined aspects of the Cleanroom methodology, the Ada Process Model and an object-oriented, state based approach. As the AF STARS demonstration project was winding down, a critical, short-fused requirement surfaced that needed to provide an automated capability to NORAD system controllers in Cheyenne Mountain. This new development project, called ATAMS (Automated Tracking and Monitoring System), was to be fielded in several phases, but the first fully operational phase was to be deployed within one year. Because of the success of the STARS/SCAI demonstration project, the Air Force decided to waive its standard approach and use the SCAI process. ATAMS was deployed early this year, on-time, on budget, and with a user that is delighted with the system. What follows is a very brief overview of some of the major aspects of the State-Based Software Development Process that was used throughout the ATAMS project.