The user-interface designer leads and coordinates the prototyping and design of the user interface, by:

  • capturing requirements on the user interface, including usability requirements;
  • building user-interface prototypes;
  • involving other stakeholders of the user interface, such as end-users, in usability reviews and use testing sessions;
  • reviewing and providing the appropriate feedback on the final implementation of the user interface (as created by other developers, i.e. designers and implementers).

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The user-interface designer should not implement the user interface. Instead, a user-interface designer should focus and devote time only on the design and the "visual shaping" of the user interface, because:

  • The skills required by a user-interface designer often need to be improved and optimized for the current project and application type (with potentially unique usability requirements)-this requires time and focus.
  • The risk of "mixed allegiances" should be delimited, that is, the user-interface designer should not become too influenced by implementation considerations (as opposed to usability considerations).
 

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© Rational Software Corporation 1998 Rational Unified Process 5.1 (build 43)