Usability <ul><li>Jeroen Zomer </li></ul><ul><li>2007-10 </li></ul>
Human Computer Interaction <ul><li>This presentation is about the  application of usability  in the concept of HCI. </li><...
Why is it so hard? <ul><li>usability suffers from the human factor. </li></ul><ul><li>people differ, per individual, count...
Human Computer Interaction system navigation interface robustness user
Human Computer Interaction system navigation interface robustness user implementation leakage
Human Computer Interaction system navigation interface robustness user
navigation <ul><li>visible navigation </li></ul><ul><li>track state </li></ul><ul><li>paths and landmarks </li></ul><ul><l...
Human Computer Interaction system navigation interface robustness user
interface <ul><li>consistancy </li></ul><ul><li>aesthetic and minimalize </li></ul><ul><li>Fitts's law* </li></ul>
Fitts's Law <ul><li>a model of human movement which predicts the time required to rapidly move to a target area, as a func...
 
Human Computer Interaction system navigation interface robustness user
robustness <ul><li>protect users work and input </li></ul><ul><li>error preventing and handling </li></ul><ul><li>reversib...
Human Computer Interaction system navigation interface robustness user
human factors (1/2) <ul><li>autonomy </li></ul><ul><li>color and designation </li></ul><ul><li>defaults </li></ul><ul><li>...
human factors (2/2) <ul><li>latency reduction </li></ul><ul><li>learnability </li></ul><ul><li>metaphors </li></ul><ul><li...
Questions?
assignment <ul><ul><li>create a a time registration application </li></ul></ul><ul><ul><li>create 3 screens: </li></ul></u...
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introduction to usability

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introduction to explain what usability is all about.

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introduction to usability

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

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