The “computer-aided designer” of today can utilize CAD tools at every stage of the design process, from behavioral and functional specification to process simulation and optimization. Software engineers can make use of various CASE tools for program development. But the conceptual design is still usually done with pen and paper even when the designer has access to a powerful computer and is knowledgeable about working with it. Many resources of computers remain unused in this design stage. The extra transfer from paper into computer makes many primary ideas undocumented. It costs time and produces unnecessary errors.
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