Most business cases are written by people who already know what they want to do and are working backwards to justify it. The result is a document that presents benefits generously, underestimates costs and risks, ignores viable alternatives, and treats its financial projections as a baseline rather than a point estimate in a range of possible outcomes. Decision-makers who approve these cases discover the problems after commitment — when the cost overrun, the benefit shortfall, and the implementation delay that the business case’s sensitivity analysis would have predicted are presented as surprises. A structured business case process forces intellectual rigour at every stage: a problem statement that is not the same as the proposed solution, an options analysis that genuinely considers alternatives, a financial analysis that uses NPV rather than undiscounted cash flows, a risk assessment that is stress-tested rather than optimistic, and sensitivity analysis that shows decision-makers what happens if the key assumptions are wrong. This free checklist gives project sponsors, programme managers, and anyone seeking investment approval a structured framework for the full business case development process.
Developed by HM Treasury and codified in the Green Book, the Five Case Model is the most comprehensive business case framework in use. It requires that a business case addresses five distinct dimensions: the Strategic Case (why is this necessary?), the Economic Case (what are the options and which produces the best value for money?), the Commercial Case (what is the procurement strategy and has it been tested?), the Financial Case (what are the financial flows and is it affordable?), and the Management Case (can the organisation actually deliver this?). A business case that is strong on strategic and economic justification but weak on management case — no credible implementation plan, no realistic resource assessment — is an investment the organisation cannot execute.
Alignment with strategy. Problem statement. Scope.
Shortlisted options. Comparative analysis. Recommended option with rationale.
Procurement strategy. Market analysis. Risk allocation.
Cost and benefit profiling. Funding sources. Affordability. NPV/IRR.
Project governance. Resource plan. Risk management approach. Benefits realisation.
This checklist covers the full business case development process in six phases — from problem statement through to executive summary and stakeholder presentation.
The most common business case weakness is a problem statement that is written as the solution. “We need a new ERP system” is not a problem statement — it is a predetermined conclusion. “Our finance team spends 40% of month-end close on manual reconciliations due to the absence of an integrated financial system” is a problem statement.
An options analysis that presents only the preferred option is not analysis — it is a presentation. A genuine options analysis includes “do nothing” as one option, considers at least 2–3 viable alternatives, and uses a consistent evaluation framework that makes the comparison fair.
A financial case that uses undiscounted cash flows rather than NPV, presents a single scenario without sensitivity analysis, or shows a payback period calculated on gross rather than net benefits is a financial case built to impress, not to inform.
Decision-makers approve or reject business cases based on the executive summary and the financial summary table. The executive summary that does not clearly state the problem, the recommended option, the cost, the key benefit, and the decision required — on one page — is an executive summary that has not been written for its audience.
Use all three: NPV for the value creation decision, IRR for comparison with other investments, and payback for risk and liquidity assessment. A business case that uses only payback period ignores long-term value. One that uses only NPV ignores liquidity risk.
The business case written in a single weekend by a committed project advocate is a business case that has avoided the hard questions. CheckFlow’s business case process requires each section to be completed in sequence — the options analysis genuinely considers alternatives, the financial model includes sensitivity analysis, and the recommendation follows from the evidence, not from the starting assumption.
The benefits that justified the investment are most valuable not at approval but at post-project review, when the question is “did we achieve what we promised?” CheckFlow’s business case process requires a benefits realisation plan — named benefit owner, measurement method, and review date — created at business case stage and linked to the post-project review.
Organisations that approve capital investment based on inconsistently structured, variably rigorous business cases cannot compare competing investment options fairly. CheckFlow’s business case checklist produces a consistent structure and a consistent analytical standard — making capital allocation decisions genuinely comparable.
An approved business case initiates a project. CheckFlow’s Project Management Documentation Checklist covers the structured documentation framework for managing the project that follows approval. See the Project Management Documentation Checklist →
Capital project business cases are among the most complex to build. CheckFlow’s Capital Project Checklist covers the full project lifecycle that follows capital approval. See the Capital Project Checklist →
A comprehensive business case covers six phases: problem statement and strategic alignment (quantified problem, strategic objective link, scope definition), options analysis (minimum three options including “do nothing,” consistent evaluation criteria, shortlist and recommendation), financial analysis (full cost estimate, quantified benefits, NPV and IRR calculation, payback period, sensitivity analysis, funding confirmation), risk assessment (risk register, mitigation actions, residual risk rating, financial case stress-tested against downside), commercial strategy and implementation plan (procurement approach, milestone plan, change management, benefits realisation plan, project governance), and executive summary and presentation (one-page summary with problem, recommendation, investment, key metrics, risks, and decision required; audience-tailored presentation).
Net Present Value (NPV) measures the total value created by an investment over its full life, expressed in today’s money — it discounts all future cash flows at the organisation’s cost of capital and sums them. Payback period measures how quickly the investment recoups its initial cost — the number of years until cumulative net benefits equal the initial outlay. NPV is the theoretically correct investment decision metric: a positive NPV means the investment creates value. Payback period is a risk and liquidity metric: a shorter payback period means less exposure to future uncertainty. Both are needed — NPV alone can justify investments whose benefits only materialise in 15 years; payback alone ignores value created after the payback date.
Sensitivity analysis tests what happens to the financial outcome (typically NPV) when key assumptions in the business case are changed — individually and in combination. For example: what is the NPV if costs are 20% higher than projected? What if benefits are 20% lower? What if both occur simultaneously? Sensitivity analysis answers the question decision-makers should always ask: “What has to be true for this investment to be worthwhile, and how confident are we that those things are true?” A business case whose NPV turns negative if costs are 10% over budget is a business case with thin margins; one that remains positive under a range of pessimistic scenarios is more robust.
The Five Case Model is a business case framework developed by HM Treasury (UK) and codified in the Green Book, used across UK public sector and widely adopted in private sector organisations. It requires a business case to address five dimensions: the Strategic Case (why is this investment necessary and how does it align with strategy?), the Economic Case (what are the options and which produces best value for money?), the Commercial Case (what is the procurement strategy and has it been tested in the market?), the Financial Case (what are the detailed financial flows, how is it funded, and is it affordable?), and the Management Case (does the organisation have the capability to deliver this, and is the governance robust?).
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