PMP Practice: Recommend a Development Approach

Ziggy Okonkwo-Petersen is managing a regulatory compliance software implementation for Velvet Hippo Cécile Dupont-Moreau. The project must integrate with seventeen legacy banking systems, comply with strict federal audit requirements, and complete before the January 1 regulatory deadline. The executive sponsor has mandated that all requirements be documented and approved before development begins, and any scope changes must go through a formal change control board due to compliance traceability obligations. The business analysis team has completed requirements gathering, and stakeholders from legal, IT operations, and compliance departments are ready to review and sign off. Ziggy is now selecting the most appropriate project management approach to recommend in the integrated project plan. Which approach would be MOST effective for this project?