How should the project manager develop the project management plan to ensure the project continually delivers the expected benefits?

The project management plan should be developed with a clear understanding of the project benefits to ensure the project continually delivers them. Clarifying these benefits with the sponsor, who champions the project and its objectives, is crucial for alignment and to ensure the plan supports their realization. Identifying each work product's goal is important for scope definition but doesn't directly address benefit realization across the entire project lifecycle. Performing integration testing for each release and including the whole project team in testing are quality assurance activities that help ensure the product works as intended, but they are downstream activities and don't define the initial benefit-driven strategy for the project management plan itself.