This question belongs to the Business Environment domain because it concerns selecting an approach that can still create value under uncertainty and misalignment. PMI guidance on choosing the right project approach says the project team should tailor the approach to uncertainty, changing requirements, and complexity. PMI also notes that in complex environments, teams should continually verify that they are building the minimum viable solution rather than over-planning or forcing a rigid approach too early. When specifications are uncertain and sponsors are not well aligned, pursuing an MVP-oriented approach is the most effective way to test assumptions, surface priorities, and deliver usable value early.