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What is usability?
Quick intro and a few rules…
Krátka prezentácia o tom, čo je to pužiteľnosť a pár pravidiel, ktoré nasledovať pri návrhoch. Prezentáciu som prezentoval v roku 2015.
- What is usability? Quick intro and a few rules… Martin Puškáč 26.06.2015, Bratislava
- Usability is a quality attribute that assesses how easy user interfaces are to use.
- Usability is deﬁned by 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?
- Usability means making sure something works well, and that a person of average ability or experience can use it for its intended purpose without getting hopelessly frustrated.
- Some rules of usability
- First Rule of Usability? Don't Listen to Users Observe them
- To design the best 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.
- Don’t make me 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.
- Don’t lose search 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.
- Don’t Make Users 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%
- Users still cling 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.
- We form mental 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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Publikované: 26.06.2015 19:53
Naposledy upravené: 18.11.2017 16:55