Explain User Interface Design

  • User interface design creates an effective communication medium between a human and a computer
  • Following a set of interface design principles, design identifies interface objects and actions and then creates a screen layout that forms the basis for a user interface prototype

Design Rules for User Interface

(1)   Place the User in Control During a requirements-gathering session for a major new information system, a key user was asked about Following are the design principles that allow the user to maintain control:

  • Define interaction modes in a way that does not force a user into unnecessary or undesired actions.
  • Provide for flexible interaction
  • Allow user interaction to be interruptible and undoable
  • Streamline interaction as skill levels advance and allow the interaction to be customized
  • Hide technical internals from the casual user
  •  Design for direct interaction with objects that appear on the screen.

(2)   Reduce the User’s Memory Load The more a user has to remember, the more error-prone the interaction with the system will be. Following are the design principles that enable an interface to reduce the user’s memory load:

  •   Reduce demand on short-term memory.
  • Establish meaningful defaults.
  • Define shortcuts that are intuitive
  • The visual layout of the interface should be based on a real-world metaphor
  • Disclose information in a progressive fashion

(3)   Make the Interface Consistent The interface should present and acquire information in a consistent fashion. Following are the design principles that help make the interface consistent:

  • Allow the user to put the current task into a meaningful context
  • Maintain consistency across a family of applications
  • If past interactive models have created user expectations, do not make changes unless there is a compelling reason to do so

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