HCI Design Heuristics

• Strive for consistency
  sequens of actions in similar situations, identical terminologi in menus, prompts etc.,
  
  
• Enable frequent users to use shortcuts
  
  
• Offer informative feedback
  for every user actions there should be system feedback.
  
  
• Design dialogs to yield closure
  sequences of actions should be organized into groups with a beginning, middle, and end.
  
  
• Offer error prevention and simple error handling
  to prevent serious errors (e.g prefer menu selection to form fillin), minimize retyping forms,..
  
  
• Permit easy reversal of actions
  
  
• Support internal locus control
  operators should be in charge (no surprises, difficulty to obtain information,..)
  
  
• Reduce short-term memory load
  human short-term memory handles 7 +-2 chunks.

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