Without a follow-up, nobody knows whether the promised benefits arrived, and the next business case repeats the same optimism.
Run it at 3 and 12 months
- Compare actual results with the baseline and the original claim.
- Compare actual run cost with the estimate.
- Record what drove the difference.
- Decide: continue, adjust, expand or retire.
- Feed the lessons into the next proposal.
Make the review owner someone outside the delivery team, so the assessment is independent.