In this phase, I define the features required to satisfy the personas' high-level requirements, as identified in the previous Requirements Definition phase.

Key tools in this phase are the scenarios that reflect the needs of personas, as well as the organizations to which they are answerable. These scenarios help me group the features in the most natural way possible. This ensures that each persona's workflow is as pleasurable and efficient as possible. Working from these natural groupings of features and functions, I define a framework in which all these features can operate harmoniously. This framework defines the overarching solution structure, all major components, and key content areas. In essence, it defines what to build, and provides insight into key technical requirements.