User-derived impact analysis as a tool for usability engineering
CHI '86 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Development of an instrument measuring user satisfaction of the human-computer interface
CHI '88 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Developing user interfaces: ensuring usability through product & process
Developing user interfaces: ensuring usability through product & process
Usability Engineering
Procurer usability requirements: negotiations in contract development
Proceedings of the second Nordic conference on Human-computer interaction
Usability Requirements in a Tender Process
OZCHI '98 Proceedings of the Australasian Conference on Computer Human Interaction
Procuring a usable system using unemployed personas
Proceedings of the third Nordic conference on Human-computer interaction
Current practice in measuring usability: Challenges to usability studies and research
International Journal of Human-Computer Studies
Personal and Ubiquitous Computing
Meta-analysis of correlations among usability measures
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Comparison of three one-question, post-task usability questionnaires
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Proceedings of the 6th Nordic Conference on Human-Computer Interaction: Extending Boundaries
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Systems of public organizations, the development of which is acquired through public tendering, often suffer from poor usability. To resolve this issue, we explored how to determine usability requirements into a call-for-tenders. Our case is a usability-critical healthcare system to be developed for a city in Finland. We explored different options, and ended up with two measures: task completion success rate for defining effectiveness requirements, and a complementary measure that we call design solution success rate. We could not find appropriate ways for defining requirements that directly address efficiency and user satisfaction. Our case shows that the tendering context sets specific restrictions to the selection of usability measures, especially from the viewpoint of target setting and objective verification.