QUICK ANSWER
What should a business case template include?
A business case template should include the decision requested, case for change, dated evidence, objectives, a do-nothing baseline, viable alternatives, common evaluation criteria, lifecycle costs, benefit hypotheses, risks, dependencies, assumptions, sensitivity tests, a conditional recommendation, and a named human decision. It should distinguish estimates from facts and never treat a score or validator as approval.
A business case should help a named decision owner decide whether a proposal merits investment. It connects a dated case for change to objectives, a do-nothing baseline, viable alternatives, lifecycle estimates, benefit hypotheses, risks, dependencies, sensitivity tests, and one conditional recommendation. It does not authorize the investment by itself.
The downloadable pack includes an editable Markdown template, a completed fictional Markdown and JSON example, a closed JSON Schema, and a dependency-free validator with 27 mutation tests. Every example amount, score, target, benefit, risk, assumption, and date is invented teaching data, not a benchmark, quote, forecast, promise, or customer outcome.
Build the case around one reviewable investment decision
Use one evidence cutoff and one option set. Keep the argument proportional to the decision, but do not skip the baseline, alternatives, uncertainty, or the named human authority.
Freeze the decision, evidence cutoff, and case for change
Name the proposal, problem or opportunity, strategic fit, decision requested, accountable roles, constraints, and date through which evidence was reviewed. Treat an objective target as a hypothesis until measured.
Sources: [business-case-pack], [hm-treasury-business-cases], [hm-treasury-green-book]
Compare a do-nothing baseline with viable alternatives
Generate materially different options before selecting a preference. Apply the same criteria and evidence rules to business as usual, minimum change, proposed change, and any other viable path.
Sources: [business-case-pack], [hm-treasury-business-cases], [hm-treasury-green-book]
Separate lifecycle costs from benefit hypotheses
Record one-time and recurring estimates, horizon, as-of date, owners, sources, and assumptions. Give every benefit a metric, baseline, target, owner, evidence, and realization state instead of presenting a target as an achieved result.
Sources: [business-case-pack], [gao-cost-guide], [hm-treasury-green-book]
Test risks, dependencies, and sensitive assumptions
Vary one important assumption at a time while holding the other example inputs fixed. Document which option ranking changes, what evidence is missing, and when the analysis needs to be repeated.
Sources: [business-case-pack], [gao-cost-guide]
Write a conditional recommendation, then require a human decision
State the preferred feasible option, rationale, conditions, uncertainty, and expiry. A named decision owner records approval, rejection, or deferral for the exact revision through the organization’s real authority process.
What this business case pack owns
This owner covers the pre-investment decision record. Adjacent owners keep their own authorization, delivery, supplier, and estimating jobs rather than being copied into one oversized document.
Included
- Case for change, objectives, dated evidence, decision roles, constraints, and one explicit decision request
- Do-nothing baseline plus viable alternatives scored against the same criteria and evidence boundary
- Lifecycle cost estimates, benefit hypotheses, risks, dependencies, assumptions, and sensitivity tests
- Conditional recommendation, uncertainty, expiry, and named human investment decision state
- Closed machine-readable record with deterministic validation and an editable human-readable template
Not included
- Project authorization, sponsor governance, RACI, milestone authority, and exit governance owned by the project charter
- Detailed delivery work, dependencies, milestone schedule, release gates, and rollback owned by the software project plan
- Supplier deliverables, fees, commercial terms, review rounds, acceptance, rights, and handoff owned by a proposal or governing agreement
- A generic website, app, SaaS, MVP, AI, hosting, maintenance, domain, or redesign cost estimate
- Finance, accounting, procurement, legal, tax, privacy, security, accessibility, regulatory, or investment advice
DOWNLOADABLE RESOURCE
Download the business case template pack
The ZIP is rebuilt from an explicit allowlist with fixed timestamps. Run the packaged tests and validator before adapting the fictional example to your controlled decision process.
Business case template pack
A deterministic investment-decision pack with one editable outline, one completed fictional example in two formats, a closed schema, semantic validator, mutation tests, and reproducible ZIP builder.
Format: ZIP with Markdown, JSON, JSON Schema, and JavaScript validator/tests
Locally reproduced August 1, 2026. SHA-256: 11c3f80a569ca818798548e7d2db92293c10309d507d24a97867b87bdba86474
Included
- Editable Markdown business case outline with explicit ownership boundaries
- Completed fictional Markdown and JSON examples with three alternatives and a pending decision
- Closed Draft 2020-12 JSON Schema with eight false authority and outcome flags
- Dependency-free semantic validator covering references, roles, dates, options, costs, benefits, risks, dependencies, sensitivity, and decision state
- Twenty-seven mutation tests plus a deterministic allowlisted ZIP builder
Verification boundary
Rebuilt twice with fixed timestamps; archive allowlist, extraction, source/public/archive byte parity, schema boundaries, 27 tests, validator output, and SHA-256 were checked locally. Public target availability is not claimed until release verification.
Three business-case shapes for different investment decisions
These patterns show how the same decision structure changes with the job. They are not completed financial models or recommendations for a real organization.
Bounded software pilot business case
Use when: A team needs evidence before funding a broad workflow replacement or production implementation.
Compare business as usual, a process-only change, and a reversible pilot. Keep expected benefits hypothetical, identify sensitive workload and labor inputs, and require stop, review, and recovery conditions before a human decision.
Structure
- Case for change linked to dated observations and one measurable pilot objective
- Do-nothing, process-only, and bounded software-pilot alternatives under common criteria
- Lifecycle estimates, benefit hypotheses, risks, dependencies, sensitivity results, and a decision expiry
Watch for: Pilot approval does not authorize production rollout, supplier spend, personal-data collection, security acceptance, accessibility acceptance, or a benefit claim.
Sources: [business-case-pack], [hm-treasury-business-cases], [hm-treasury-green-book], [gao-cost-guide]
Process automation business case
Use when: A manual workflow has evidence gaps and the team needs to compare process repair, purchased software, custom software, and business as usual.
Define the workflow outcome and decision boundary first, then keep each option on the same evidence, lifecycle, risk, dependency, exit, and measurement basis. Use the build-versus-buy guide for a deeper sourcing comparison.
Structure
- Current observation and target measure without presenting the target as achieved
- Baseline, process repair, buy, build, or hybrid options as the evidence supports
- Option-specific costs, expected benefits, failure exposure, exit conditions, and named reviewers
Watch for: Automation can move or amplify a bad decision. Qualified owners still need to review access, data, security, accessibility, employment, legal, and operating boundaries.
Sources: [business-case-pack], [hm-treasury-business-cases], [gao-cost-guide]
Replace-or-retain system business case
Use when: An existing system has known operating cost or constraints, but replacement risk and migration evidence are incomplete.
Keep retention and targeted improvement as real options, not straw alternatives. Model migration, dual-running, training, data, integration, recovery, and exit assumptions separately, then test the variables that can reverse the preference.
Structure
- Retain, improve, replace, and staged transition options under one evaluation framework
- Lifecycle estimates with dated assumptions, dependencies, risks, and transition uncertainty
- Conditional recommendation that expires when evidence, supplier terms, or operating constraints change
Watch for: A business case does not prove migration completeness, supplier terms, data rights, security, accessibility, operational readiness, or recovery. Those require separate controlled evidence.
Sources: [business-case-pack], [hm-treasury-green-book], [gao-cost-guide]
Decide whether the business case is ready for review
The case is reviewable when each recommendation can be traced to dated evidence, comparable alternatives, explicit assumptions, and a named human authority. Missing information stays visible as a condition or blocker.
The case begins with the preferred solution and has no real do-nothing or minimum-change alternative.
Choose: Return to options generation and compare at least three materially different paths under the same criteria.
Tradeoff: The decision takes longer, but the preferred solution is no longer protected from a meaningful baseline comparison.
A benefit target, score, or narrative is presented as a realized result without dated evidence.
Choose: Relabel it as a hypothesis, add the measure, baseline, target, owner, evidence requirement, and review date, or remove it.
Tradeoff: The case may look less certain, but it stops converting aspiration into an unsupported outcome claim.
One-time cost is visible, but recurring operation, migration, training, exit, support, or uncertainty is omitted.
Choose: Rebuild the lifecycle view and cite every estimate’s assumptions, owner, as-of date, horizon, and exclusions.
Tradeoff: The estimate becomes less compact, but the alternatives can be compared on the same time boundary.
A small change to workload, labor, adoption, schedule, or supplier assumptions reverses the option ranking.
Choose: Gather evidence for the sensitive assumption or approve only a bounded reversible test with a stop decision.
Tradeoff: A broad commitment is delayed, but the team learns about the variable that actually controls the recommendation.
A score, signature image, template status, validator, or recommendation is being treated as investment approval.
Choose: Keep the case under review until a named human decision owner records the exact revision, decision, conditions, authority, and date in the real organizational process.
Tradeoff: The template cannot make the decision automatic, but approval remains attributable and reviewable.
FROM INVESTMENT DECISION TO A BOUNDED WORKFLOW
Build only the option the evidence supports
Turn approved roles, records, states, checks, exclusions, monitoring, and stop conditions into a bounded internal workflow. Keep unresolved assumptions and qualified reviews visible.
Explore internal tool buildingA Playcode build does not replace finance, procurement, privacy, security, accessibility, legal, regulatory, or operating review.
Compare build, buy, and hybrid software optionsUse the build-versus-buy owner when sourcing strategy is the decision. This template owns the broader investment case and named human decision record.
Limits of this business case template
A structured record can expose missing fields, references, assumptions, option coverage, dates, and authority boundaries. It cannot validate the real-world truth or decide whether an investment is right.
- The pack is an editorial planning artifact, not finance, accounting, procurement, legal, tax, privacy, security, accessibility, regulatory, investment, or jurisdiction-specific advice.
- Every person, organization, observation, amount, score, target, benefit, risk, dependency, assumption, option, recommendation, and date in the example is fictional teaching data.
- The validator checks closed shape, stable IDs, references, roles, dates, weights, option coverage, estimate boundaries, benefit states, risk ownership, sensitivity tests, decision state, and eight false authority flags. It does not prove any supplied fact.
- HM Treasury and GAO guidance supports general appraisal, business-case, option, cost, risk, and sensitivity structure. Neither organization reviewed, approved, certified, or endorsed this Playcode artifact.
- A business case is not a project charter, supplier proposal, statement of work, contract, purchase order, budget approval, accounting record, project plan, requirements document, or proof of realized benefits.
- Keep credentials, personal data, protected financial records, supplier bids, legal advice, security findings, and confidential decisions out of a public template file.
- Use qualified owners to review the real evidence, authority, finance, procurement, privacy, security, accessibility, legal, regulatory, tax, employment, safety, and operating obligations.
Primary guidance and artifact evidence
These official sources support the option, appraisal, cost, risk, sensitivity, and decision structure. The downloadable template, fictional example, schema, and validator are Playcode editorial work.
[business-case-pack] Playcode:Business case template pack
Checked August 1, 2026. Supports: The same-release editable template, fictional example, closed schema, semantic validator, 27 mutation tests, deterministic builder, and recorded SHA-256.
[hm-treasury-business-cases] HM Treasury:Guidance on developing business cases
Checked August 1, 2026. Supports: The current 2026 Five Case Model guidance for developing strategic, economic, commercial, financial, and management dimensions together through an iterative business-case process.
[hm-treasury-green-book] HM Treasury:The Green Book 2026
Checked August 1, 2026. Supports: Current public-sector appraisal guidance for rationale and objectives, broad option generation, longlist and shortlist appraisal, costs, benefits, risks, dependencies, unintended consequences, and value-for-money decisions.
[gao-cost-guide] U.S. Government Accountability Office:Cost Estimating and Assessment Guide, GAO-20-195G
Checked August 1, 2026. Supports: Best-practice structure for scope, technical baseline, assumptions, data, estimating methods, sensitivity and risk analysis, documentation, presentation, and updates from actual costs.
Business case template questions
What is a business case?
A business case is a controlled decision record that explains why change may be needed, compares viable alternatives including business as usual, exposes costs, expected benefits, risks, dependencies, assumptions, and uncertainty, and presents a conditional recommendation to a named human authority.
What is the difference between a business case and a project charter?
The business case supports an investment decision by comparing the case for change and alternatives. A project charter authorizes and governs a bounded project through sponsor, authority, high-level scope, roles, milestones, risks, and exits. A favorable business case does not create project authority automatically.
Is a business case the same as a business plan?
No. A business case usually supports one proposal or investment decision within an organization. A business plan describes how a business intends to operate, serve a market, earn revenue, fund itself, and manage its broader strategy. Keep the document aligned to the actual decision.
Should a business case include a do-nothing option?
Yes. A real business-as-usual baseline makes the cost, benefit, risk, and dependency of not changing visible. It should not be a straw option. Use the same evidence cutoff and evaluation criteria applied to the other viable alternatives.
How should benefits appear in a business case?
Record each benefit as a hypothesis until it is observed. Name the metric, baseline, target, owner, target date, evidence requirement, and limitations. Do not present a target, score, forecast, or preferred option as a realized outcome.
What is sensitivity analysis in a business case?
Sensitivity analysis changes one documented assumption or cost driver at a time while holding the other inputs fixed, then records whether the result or option ranking changes. It helps identify which uncertain inputs deserve better evidence before commitment.
Does a completed template approve the investment?
No. A template, score, recommendation, signature image, schema, or validator cannot establish authority or approve spend. A named human decision owner must review the exact revision through the organization’s qualified finance, procurement, legal, security, accessibility, and governance processes.
TURN THE APPROVED BOUNDARY INTO A REVIEWABLE FIRST VERSION
Build the smallest workflow that can test the decision
Describe the approved users, records, roles, states, evidence, exclusions, checks, monitoring, and stop conditions. Keep every unresolved assumption and qualified review outside the claims the app can make.
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