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Final Business Case
What it is
The Final Business Case (FBC) takes the chosen option through procurement, putting in place delivery plans and providing the final detailed costing.
The key steps of the FBC are to:
- procure the solution
- create a contract for the deal
- ensure successful delivery
You must have written and signed off the Outline Business Case (OBC) before you start this phase.
What to write
- The FBC adds more detail to the OBC.
- The headings are the same. You need to revisit all the elements and update them with new information, if appropriate.
- The only extra heading you need is in the management case where you need to provide details of your contingency plans.
What you should have at the end of the FBC phase
Your FBC is complete when you have confirmed the chosen option remains the best solution after procurement and have finalised the delivery, financial and commercial arrangements. At this stage you present the final contract, costs, benefits and plans for successful implementation.
What the FBC must include
Strategic Case
- confirmation of any changes to the strategic context
- evidence that the preferred option is still viable
- any new business needs or requirements
Economic Case
- full procurement process and supplier offers
- rationale for selecting the preferred supplier
- updated value‑for‑money assessment
- updated public sector comparator (if applicable)
Commercial Case
- final service streams and outputs to be contracted
- agreed implementation timescales
- negotiated risk allocation
- payment mechanisms and risk transfer premiums
- final contract and key contractual terms
- compliance with SG and SPFM standards
- accountancy treatment (confirmed by external auditors)
- personnel implications and how they will be managed
Financial Case
- comprehensive analysis of whole‑life cost
- financial model with updated assumptions
- financial risks and mitigations
- updated optimism‑bias assessment
- capital and revenue implications
- net effect on charges (if any)
- impact on income/expenditure account and balance sheet
- affordability and confirmed funding arrangements
- explanation of any changes from the OBC
- evidence that the preferred option is still the most viable option
Management Case
- final project management arrangements
- final change management arrangements
- final benefits realisation plan + full Benefits Register
- final risk management plan + full Risk Register
- contract management arrangements
- plan for managing contract variations
- evaluation plan including post‑project
- contingency plans for service failure