Designing for usability—key principles and what designers think
CHI '83 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Tools and methodology for user interface development
ACM SIGGRAPH Computer Graphics
The mirage rapid interface prototyping system
UIST '88 Proceedings of the 1st annual ACM SIGGRAPH symposium on User Interface Software
Innovation in user interface development: obstacles and opportunities
CHI '89 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Making usable, useful, productivity-enhancing computer applications
Communications of the ACM
Iterative methodology and designer training in human-computer interface design
CHI '93 Proceedings of the INTERACT '93 and CHI '93 Conference on Human Factors in Computing Systems
Organizational obstacles to interface design and development: two participant-observer studies
ACM Transactions on Computer-Human Interaction (TOCHI)
Practical usability evaluation
CHI '94 Conference Companion on Human Factors in Computing Systems
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In a recent paper, Gould and Lewis (1983a) argued for the importance of four key principles in computer system design. These principles are: early focus on users, interactive design, empirical measurement, and iterative design. Gould and Lewis also express their belief that these principles are essential to successful design and refer to an example of their use (Gould and Lewis, 1983b). It is the purpose of this paper to report another example of how these principles played a major role and proved their worth in the design of a successful system.