Why This Book, Why Now? It is now widely recognized that in the
development of IT systems, the technology- driven focus of the past has
been eclipsed by a concern for user satisfaction and user productivity.
It is well known that usability engineering helps make systems easier to
use and more relevant to business needs. The benefits of producing
usable computer systems have been proven in careful dollar or pound
calculations and any computer user who has interacted with a system
designed for usability will enthuse about the benefits and refuse to go
back to the bad old days. More and more organizations are starting to
take usability seriously. Along with Microsoft and Apple and other IT
organizations, we now find banks, insur- ance companies, multi-national
pharmaceuticals and many other non-IT corpora- tions starting to "do
something about usability". It seems as if there is plenty of material
explaining how to do it. HCI (Human Computer Interaction - or CHI,
Computer Human Interaction in the USA) has been studied in academia for
several years and there are a range of books on usability engineering
for practi- tioners from systems engineering and user interface design
to usability evaluation. However, as many practitioners have found,
although you do need to understand the theories and be familiar with the
techniques, applying them in a commercial context is not a
straightforward matter.