as hard as possible for our beliefs that computing systems, whether application
software, operating systems, or the Web, ultimately will be used by humans and
must be easy for humans to use. So, for this chapter, we discuss cost effective-
ness, but our focus will be on how to produce the best UI and Web site for the
various types of users.
15.1 GETTING IT RIGHT OUT OF THE BOX
Human factors practitioners commonly prescribe an iterative design process
(e.g., Boehm, 1989; Gould and Lewis, 1985). Related to that prescription is the
belief that “You can’t get a perfect interface right out of the box.” However great
the need for iterative design, designers ...