During which phase is the initial logic of a decision project developed and refined?

The initial logic of a decision project is developed and refined during the Elaboration and Construction phase. This phase is crucial because it focuses on translating the project requirements into a workable model. At this stage, the team establishes a clear understanding of how the decision logic should operate, ensuring it aligns with business objectives and user needs.

During the Elaboration and Construction phase, teams engage in activities like detailed design, prototyping, and iterative testing, allowing for adjustments based on feedback. This iterative process facilitates the refining of decision logic, helping to identify any potential gaps or changes needed in the approach to decision-making.

Other phases, such as Inception, typically involve defining the project's scope and high-level requirements without getting into the specifics of decision logic. The Implementation phase is more focused on deploying the finalized system into production, while the Post-Implementation phase involves evaluation and maintenance, rather than development. Thus, it is in the Elaboration and Construction phase where the foundational work on decision logic is predominantly carried out.