For many years the User Systems Engineering Group at Texas Instruments has been using software user-interface prototypes as a primary tool for the design and development of user interfaces for complex systems. Our model of the prototyping life cycle is introduced and its benefits are discussed. Current issues in prototyping often center around the introduction of new prototyping tools such as HyperCard™ or Prototyper™. Our discussion focuses on how these tools fit within the prototyping life cycle.
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