Introduction
Elaboration is the initial series of iterations during which:
the majority of requirements are discovered and stabilized
the major risks are mitigated or retired
the core architectural elements are implemented and proven
Rarely, the architecture is not a risk—for example, if building a website like others the team has successfully built, with the same tools and similar requirements—in which case, it does not have to be a focus of these early iterations. In that case, critical but non-architecturally significant features or use cases may be implemented.
It is in this phase that the book emphasizes an introduction to OOA/D, applying the UML, patterns, and architecture.
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