The senior user needs to ensure that the outputs will be used effectively to achieve...

When the senior user ensures that the outputs will be effectively used to achieve the outcomes and realize the benefits, they are applying the element of "Planning benefit reviews during the project" within effective business case management. This involves scheduling and conducting reviews to assess how the project's outputs are being used and whether the expected benefits are being realized, ensuring alignment with the project's business case.References: (PRINCE2® 7 Foundation Handbook, AXELOS)