Air traffic control, controller workload, capacity, computer modifying the proposed phase I work will develop a critical sector detector tool concept that works. The tool will evaluate air traffic controller workload. It will analyze the task requirements of human controllers, calculate workload for the various controller positions of a sector team, and compare workload estimates with saturation limits to identify potential overloads. It would allow air traffic control facility personnel to experiment with alternative airspace designs, traffic scenarios and procedures to enhance operational koefficiency. The phase I sport will design an algorithm and data processing structure for the critical sector detector tool and exercise the algorithm to assess its effectiveness res: the workload analysis methodology will be applicable to tactical decision making operations, including traffic control rooms, in commercial facilities such as those involving people and materials transportation, electric power production and delivery, production lines and distribution systems in general.