Cost-Justifying Usability, 2nd Edition

designer’s imagination than from constraints imposed by others, including the

various shareholders in the design. The ability to work successfully within those

constraints is a hallmark of a creative designer.

Creative design often requires an understanding of others’ good ideas and

the ability to extend those ideas in the service of the creation of novel ideas. This

contrasts with design by analogy, which is described later. In addition, creative

design must occur within the context of domain knowledge. The rules of this

game all relate to what the designer can expect from users. Without this knowl-

edge, successful novel or unique solutions to usability ...