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Usability > Assessment Methods - 2 of 3
 
 


Usability Assessment Methods (continued)

  • User assessments - Applicable to all design phases.  In early stages, users assess and give feedback on paper or whiteboard sketches, paper storyboarding, and computer-based prototyping.  Typically, individual assessments are followed by group discussions that lead to redesign.  This process is repeated until the designs are refined enough to proceed to more concrete representations and prototyping.  In later stages, these assessments merge into co-operative evaluation and user performance evaluation.

  • Co-operative evaluation - Suitable for use as soon as a part-task or full-task prototype or simulator is available.  The design team and user group collaboratively identify interface problems.  Users employ a "thinking-aloud" technique and verbally express their thought processes as they perform specific tasks.  These are recorded for analysis and joint discussion by the design team and the user group.

In-progress co-operative evaluation using En Route Air Traffic Control Simulation.

FAA William J. Hughes Technical Center
Human Factors Laboratory
 
 

 

 
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