ABSTRACT
The ultimate representation constructed by designers during their work on a design project is supposed to express the artifact's specifications—or, in problem-solving terms, the solution to the problem. Three aspects of an artifact must be expressed by these specifications: What—the artifact product itself—how —the procedure by which it should be implemented—and why, that is, "the reason why the design should be as it is" (Stacey & Eckert, 2003, p. 170).
