Ui design

1
Ui design general guidelines
2
Why designers go astray

• Putting aesthetics first "It probably won a
  prize."
• Designers are not typical users (esp programmers)
  
• Clients are not always users

3
Key Pillars of Design

• Guidelines
• Prototyping
• Reviews and usability testing

4
How do you help users to avoid errors?

• Put the knowledge in the world
• Use the power of natural and artificial
  limitations
• Simplify the structure of tasks
• Invite exploration (make things visible when
  relevant)
• Design expecting error

5
Eight golden rules of interface design

• Strive for consistency
• unless you have a good reason not to
• Provide shortcuts
• Offer informative feedback
• Design dialogs to yield closure
• Permit easy reversal of actions
• Support internal locus of control
• Reduce short term memory load

6
Balance of Automation and Human Control

• Let humans do what humans do best and computers
  do what computers do best
• Humans better at sensing low level stimuli,
  pattern recognition, inductive reasoning,
  multiple strategies, adapting
• Computers better at counting and measuring,
  accurate storage and recall, rapid and consistent
  responses, data processing/calculation,
  repetitive actions, performance over time

7
How to do things wrong

• Make things invisible
• Be arbitrary
• Be inconsistent
• Make operations unintelligible
• Be impolite
• Make operations dangerous

8
How to do things right

• Use knowledge in the world and knowledge in the
  head see forcing
• Simplify the structure of tasks
• Make things visible (invite exploration)
• Get the mappings right
• Exploit the power of constraints
• Design for error
• Standardize

9
Forcing

• Forcing functions
• Examples locking keys in car, interlocks on
  seatbelts, forgetting bank cards, swiping pens
• Methods interlocks, lockins, lockouts
• Design lessons
• Put the knowledge in the world
• Use the power of natural and artificial
  constraints
• Narrow the gulfs of execution and evaluation