A man is rich in proportion to the things he can afford to let alone.
—HENRY DAVID THOREAU
Arranged in your computer is a collection of use case documents, and each one describes a possible system component. This set of requirements may be discouragingly large. You must now select the best options identified during the Filled iteration and include only these in the project scope.
The Focused iteration clears a path through the paperwork and leaves you with clear project requirements. At the end of this iteration, you will have defined the system and will have gathered sufficient information ...