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What is usability
Usability refers to how easy user interfaces are to use and is defined by five key components: learnability, efficiency, memorability, errors, and satisfaction. Usability aims to ensure something works well for average users without causing frustration. Some rules of good usability include observing rather than just listening to users, making things obvious so users don't have to think, including search features, ensuring fast page loads, and allowing easy use of the back button. Users form mental maps of sites, so design should support easy navigation.
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What is usability
- 1. What is usability? Quickintro and a few rules… Martin Puškáč 26.06.2015, Bratislava
- 3. Usability is aquality attribute that assesses how easy user interfaces are to use.
- 4. Usability is definedby 5 quality components: • Learnability: How easy is it for users to accomplish basic tasks the first time they encounter the design? • Efficiency: Once users have learned the design, how quickly can they perform tasks? • Memorability: When users return to the design after a period of not using it, how easily can they reestablish proficiency? • Errors: How many errors do users make, how severe are these errors, and how easily can they recover from the errors? • Satisfaction: How pleasant is it to use the design?
- 5. Usability means makingsure something works well, and that a person of average ability or experience can use it for its intended purpose without getting hopelessly frustrated.
- 7. Some rules ofusability
- 8. First Rule ofUsability? Don't Listen to Users Observe them
- 9. To design thebest UX, pay attention to what users do, not what they say. Self- reported claims are unreliable, as are user speculations about future behavior. Users do not know what they want.
- 10. 2. Don’t makeme think As a rule, people don’t like to puzzle over how to do things. If people who build a site don’t care enough to make things obvious it can erode confidence in the site and its publishers.
- 11. 3. Don’t losesearch Some people (search-dominant users), will almost always look for a search box as they enter a site. These may be the same people who look for the nearest clerk as soon as they enter a store.
- 12. 4. Don’t MakeUsers Wait Bing, Microsoft’s search engine, conducted an analysis that showed that a less than 2- second increase of delays in page responsiveness reduced user satisfaction by -3.8%, lost revenue per user of -4.3% and a reduced clicks by -4.3%
- 13. 5. Users stillcling to their back buttons There’s not much of a penalty for guessing wrong. Unlike firefighting, the penalty for guessing wrong on a website is just a click or two of the back button. The back button is the most-used feature of web browsers.
- 14. 6. We formmental site- maps When we return to something on a Web site, instead of replying on a physical sense of where it is, we have to remember where it is in the conceptual hierarchy and retrace our steps.
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- 17. Sources 1. http://www.nngroup.com/articles/first-rule-of- usability-dont-listen-to-users/ 2. http://www.uxbooth.com/articles/10-usability- lessons-from-steve-krugs-dont-make-me-think/ 3.http://sixrevisions.com/usabilityaccessibility/10- usability-tips-based-on-research-studies/ 4. http://www.nngroup.com/articles/usability-101- introduction-to-usability/ 5. http://www.wqusability.com/articles/more-than- ease-of-use.html 6. http://www.slideshare.net/tsharon1/perfectly- executing-the-wrong-plan