Usability Training - UDSM 06/2010


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Slides from a usability presentation/workshop I gave with Timo Nevalainen for the trainers in the University of Dar es Salaam.

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Usability Training - UDSM 06/2010

  1. 1. Usability Training UDSM, June 7 Marko Teräs, Timo Nevalainen
  2. 2. Kick-Off Questions Your thoughts on usability? Your goals and wants for this session
  3. 3. Agenda Definition of Usability Why Usability? User-centered design User Experience Usability evaluation Usability testing
  4. 4. Definition of Usability • Usability is the degree to which something - software, hardware or anything else - is easy to use and a good fit for the people who use it. • It is a quality or characteristic of a product. • It is whether a product is efficient, effective and satisfying for those who use it. • It is the name for a group of techniques developed by usability professionals to help create usable products. • And, it is a shorthand term for a process or approach to creating those products, also called user-centered design.
  5. 5. Definition of Usability “After all, usability really just means making sure that something works well: that a person of average (or even below average) ability and experience can use the thing - whether it’s a Web site, a fighter jet, or a revolving door - for its intended purpose without getting hopelessly frustrated.” Krug, Steve (2006). Don’t Make Me Think!: A Common Sense Approach to Web Usability.
  6. 6. Definition of Usability
  7. 7. Definition of Usability User Experience (Jesse James Garrett)
  8. 8. Why Usability? The economical point of view Claire Karat (1990): The investment ROI (return on investment) of usability is 1:3 - 1:100 Excercise: 300 workers in a middle sized company use a software for a certain task 30 minutes per day. Because of the weak quality, doing the tasks takes 10 minutes longer than it would take if the usability had been better taken care of in the software development process. How much the company would’ve saved costs per year, if the worker’s pay is 10 dollars per hour. Answer: 300 users x (10,00 e x 1/6 h) x 200 work days = about 100 000 $ per year [Here is not counted the additional costs that may come from frustration and stress or from the weakening quality of work.]
  9. 9. User-centered design Identify need for human- centred design Understand and specify the context of use System satisfies the Specify the user and Evaluate against specified organizational design requirements requirements requirements Produce design solutions
  10. 10. Intangible Usability Psychology Emotions & Culture Affordance User needs User experience Sounds Layout Video / Animation Typography Colors Images Tangible
  11. 11. Intangible To make usable content is to test it Emotions: To who are we doing? Make people enjoy Why and where we are doing? Did the users get (Design Rationale) what they came for? How to do it then? Sounds: Give options Layout: and are there Guide the User speakers? Motion: How heavy and Fonts that work does it open? and few of them. Images: Colors: Culture Support and aesthetics and optimize Tangible
  12. 12. User-centered design Design a clear and simple navigation system. According to Web usability expert, Jakob Nielsen, a good navigation system should answer three questions: Where am I? Where have I been? Where can I go?
  13. 13. Usability evaluation Jakob Nielsen’s Heuristics Make your own.
  14. 14. Usability testing Light-weight testing can be done more often Light-weight testing is cheaper and easier to approve Use real users, real tasks [scenarios] Observe, don’t interfere/manipulate Do no harm.
  15. 15. More Reading from… Jakob Nielsen ( Steve Krug ( “Ginny” Redish ( JoAnn Hackos ( Jesse James Garrett ( Peter Morville ( Lou Rosenfeld ( Sinkkonen, Kuoppala, Parkkinen: Professional Psychology of Usability
  16. 16. Feedback us, please How did you find this training session? What did you learn? How would you improve the session?