To ensure an ERP project delivers its intended outcomes-process improvement, error reduction, and better user services-the project manager must continuously validate that what is being produced still supports the business case. Evaluating deliverables against the business case continuously (B) enables early detection of
"solution drift," where features may be delivered but do not drive the targeted benefits. Ongoing evaluation supports benefits realization management: confirm KPIs, test process improvements, validate user journeys, and adjust priorities so the evolving solution stays aligned to value. Reviewing the business case only at the end (C) is too late; by then, changing direction is expensive and value gaps are locked in. Reviewing the business case only when change requests occur (A) is reactive and may miss gradual misalignment that doesn' t trigger formal changes. Combining customer feedback with business case review (D) is useful, but the best answer focuses on continuous alignment of deliverables to the business case, using feedback as an input within that ongoing validation loop. Continuous evaluation protects strategic alignment and maximizes ROI.