Scaling Usability in Terms of Requirements: A Method for Evaluating User Interfaces
Martin L. Fracker · Proceedings of the Human Factors and Ergonomics Society Annual Meeting · 2010
Software usability should be scaled in terms of the probability that a user interface will meet established usability requirements. This paper describes a scaling procedure that first estimates the distribution of common usability metrics and then calculates the probability that a user interface will meet a specific requirement. A series of Monte Carlo simulations showed that even with a small sample of usability test participants, the scaling procedure remained unbiased and could accurately differentiate usable from unusable user interfaces.