Detailing outlined elements is a necessity to making them ready for development. Therefore, the detail phase only exists to prepare details for the first iteration in the subsequent build phase.
Usually just one, which is enough to make the first features ready for development in the (first iteration of) build phase.
In addition to general refinements the risk and problem lists should be updated.
Detail the necessary activities and required resources.
As the project gets ready to enter the build phase it’s time to complete the document as far as it’s possible to provide the best possible basis for the developers, designers, writers and testers.
Continuously refined as more business rules are revealed in the course of detailing business processes and use cases.
Detail the business processes that will utilize the first features that will be released in the first iteration in the build phase.
Detail the use cases that will be developed in the first iteration in the build phase.
Write release notes for any releases made in this phase. Since this phase details the first use cases, any releases in this phase are most likely to be focused on verifying technology choices and release capabilities.
Finish the phase with an iteration report that lists achievements and lessons learned.