A method for calculating performance times for users of interactive computing systems
Presents a way in which one of the factors, time to perform a task, can be calculated at design time from a simple model. The technique gives estimates accurate to about 20% of actual times required by users (measured under laboratory conditions) in a variety of different tasks and systems. Several examples of the use of the model for interface design and analysis are discussed.
Card, S. K. A method for calculating performance times for users of interactive computing systems. Proceedings of the International Conference on Cybernetics and Society; 1979 October 8-10; Denver; CO. NY: IEEE; 1979; 653-658.