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introduction to explain what usability is all about.

introduction to explain what usability is all about.

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introduction to usability introduction to usability Presentation Transcript

  • Usability
    • Jeroen Zomer
    • 2007-10
  • Human Computer Interaction
    • This presentation is about the application of usability in the concept of HCI.
    • A usable system is a system which behaves in a way, so that people can easily satisfy their task-at-hand.
    • Usability has no laws, but heuristics.
    • Wrong usability is easily recognized.
  • Why is it so hard?
    • usability suffers from the human factor.
    • people differ, per individual, country, background, education, training, habits.
    • people differ in training, IQ, handicaps, size, experience and beliefs.
    View slide
  • Human Computer Interaction system navigation interface robustness user View slide
  • Human Computer Interaction system navigation interface robustness user implementation leakage
  • Human Computer Interaction system navigation interface robustness user
  • navigation
    • visible navigation
    • track state
    • paths and landmarks
    • anticipation
    • allow out, but easier in
    • stable, clear home
  • Human Computer Interaction system navigation interface robustness user
  • interface
    • consistancy
    • aesthetic and minimalize
    • Fitts's law*
  • Fitts's Law
    • a model of human movement which predicts the time required to rapidly move to a target area, as a function of the distance to the target and the size of the target.
  •  
  • Human Computer Interaction system navigation interface robustness user
  • robustness
    • protect users work and input
    • error preventing and handling
    • reversibility and undo (redo = undo undo )
  • Human Computer Interaction system navigation interface robustness user
  • human factors (1/2)
    • autonomy
    • color and designation
    • defaults
    • accelerators
    • efficiency of users
    • human objects
  • human factors (2/2)
    • latency reduction
    • learnability
    • metaphors
    • readability
    • recognize over recall
    • help and document
  • Questions?
  • assignment
      • create a a time registration application
      • create 3 screens:
      • book hours
      • periodic overview
      • select and generate reports