PMP Practice: Document agreement on ownership for ongoing benefit realization

Sahar Mohammadi is managing a predictive project for Aperture Wave Group to develop a new patient scheduling platform for healthcare providers. The project is 70% complete and on track for delivery. However, during a steering committee review, the sponsor raises a concern: while the deliverables align with technical specifications, no one has validated whether the platform will actually reduce patient wait times and improve clinic throughput—the two primary business outcomes the project was intended to achieve. The sponsor asks Dante how the project team will confirm these benefits are realized. Dante realizes the benefits management plan was created at project initiation but has not been revisited, and no measurement approach was defined for post-deployment. What should Dante do to address this situation?