Usabilty
Feature fatigue-increasing the number of usefull functions at the expense of usability
Phones originating from cell phones or from PDA
-Calling a number from contacts
-Surfing the web
-Apt on calendar
-Send e-mail
Significant issues arose with internet and push mail
Higher complexity =lower usablilty
Having to navigate to perform multiple functions decreases ease of use yet is essential for such a small compact device
Clear task guidance and navigation aids are more important in determining usability
Gestural Interface
Usability of apple ipad
Why are there problems?
-No guidelines for gestural control
-Ignoring established conventions
-Releasing untested and unproven efforts
-Bold explorations should remain inside the company until proven
Fundamental priciples of interactive design:
-Visabiltiy: How is the user to know about non-visible controls ( swiping)
-Consistencey: Have the same operation controlled the same consistenly
-Feedback
-Non-destructive operations
-Discoverabilty: Menus can allow the user to discover on there own
-Scalability: sensitive screens should be scaled to size
-Reliability: Touching something you didn’t mean to, or trying to activate a command and it doesn’t register
Who doesn’t love an undo button!