Cost-Justifying Usability, 2nd Edition

have to mimic the physical layout of a Barnes and Noble bookstore. The proce-

dures that book buyers apply in the real world are not so necessary to the pur-

chase experience that they overcome the advantages of a Web site, (e.g., the

ability to quickly search for a specific item). This caveat highlights a more general

concern in analogical design—how much of the analogical model should you

use? Thinking by analogy requires both the transfer of relevant knowledge from

the model and the recognition that the model differs from the new thing that

is being considered. Taken in the design context, this means that the designer

needs to decide which elements ...