ABSTRACT
The principles of scientific management enunciated by D. K. Taylor and the study of human movement patterns at work which developed into time and motion study exemplified this approach, with its quest to improve productivity and motivation and its development of techniques for job analysis and design. A more human–centred influence on Human Factors concerned the attributes of work that could satisfy human needs and aspirations. The effects of systems on the operators who worked within them constituted another seminal influence on Human Factors. Many organizations have at some time sponsored or reported human factors work on air traffic control. Human factors studies of air traffic control paid insufficient heed to preferences or individual differences, tended to presume that every question must have a single optimum answer, and lacked subtlety in their treatment and classification of controllers' skills. Many official bodies concerned with air traffic control research have devoted resources to its human factors aspects.
