User-Centred Design:Design Guidelines(lecture-6) Prof. Dr. Matthias Rauterberg Faculty Industrial Design Technical University of Eindhoven email@example.com
The History of Usability Definitions DIN 66 234 EC directive ISO 9241 part 8 90/270/EEC part 10 (1988) (1990) (1996) suitability for the task suitability (activity adapted) suitability for the task self-descriptiveness feedback about system states self-descriptiveness appropriate format and pace of information presentation conformity with user conformity with user expectations expectations information and instruction of suitability for learning ease of use applicable to suitability for individualization hearing and participation of controllability controllability error robustness error tolerance
ISO Definition of Quality of Use • The ISO 9241 standard defines three components of "quality of use" applicable to the design of user interfaces: • EffectivenessDoes the product do what the users require? Does it "do the right thing?" • EfficiencyCan the users learn the user interface quickly? Can they carry out their tasks with minimum expended effort, including a minimum of errors? Does it improve the productivity/effort ratio? Does it "do things right?" • SatisfactionDo users express satisfaction with the product? Does the new product reduce stress? Do the end users now have a more satisfying job?
The Basic Triangle: T-U-S • user-oriented requirement analysis • know the user • describe the context of use • analyze the user‘s tasks • decide for user-system function allocation task(s) task design automation qualification functionality usability user system training
List of relevant books for the area of human-computer interaction (HCI) • About HCI in general: • D. Norman, S. Draper: User centered system design. Lawrence Erlbaum, 1986. • P. Booth: An introduction to Human-Computer Interaction. Lawrence Erlbaum, 1990. • L. Barfield: The user interface - concepts & design. Addison Wesley, 1993. • A. Dix, J. Finlay, G. Abowd, R. Beale: Human-Computer Interaction. Prentice, 1993. • J. Preece, Y. Rogers, H. Sharp, D. Benyon, S. Holland, T. Carey: Human-Computer Interaction. Addison Wesley, 1994. • L. Macaulay: Human-Computer Interaction for Software Designers. Thomson, 1995. • B. Shneiderman: Designing the user interface. Addison Wesley, 1997, 3rd edition. • About design principles: • C. Brown: Human-Computer Interface design guidelines. Ablex, 1989. • W. Galitz: Handbook of screen format design. QED, 1989. • D. Hix, R. Hartson: Developing user interfaces. Wiley, 1993. • ISO 9241 (Part 10: Dialogue principles, Part 12: Presentation of information, Part 14: Menu dialogues, Part 15: Command dialogues, Part 16: Direct manipulation dialogues, Part 17: Form fill-in dialogues) • D. Mayhew: Priniples and guidelines in software user interface design. Prentice, 1992. • C. Gram, G. Cockton (eds.): Design priniples for interactive software. Capman & Hall, 1996. • About usability evaluation methods: • D. Freedman, G. Weinberg: Walkthroughs, Inspections, and technical reviews. Dorset, 1990. • J. Dumas, J. Redish: A practical guide to usability testing. Ablex, 1993. • A. Monk, P. Wright, J. Haber, L. Davenport: Improving your Human-Computer Interface: a practical technique. Prentice Hall, 1993. • ISO 9241 (Part 11: Guidance on usability, Part 13: User guidance) • J. Nielsen, R. Mack (ed.): Usability inspection methods. Wiley, 1994.