The Importance of Concerns
Have you ever observed the following situation? A computer system is built to satisfy well-specified
requirements. The requirements clearly describe the task to be supported, and the system
satisfies them. Despite all this care and attention, the system is universally condemned by
management and users. Why does this happen? Surprisingly often, the task supported is not one that
users actually perform. More likely, the model of work underlying the computer system interferes
with other tasks the user wants to perform