Skills· Strategy & Decision-Making

    The Business Case Builder

    Turns a project idea, its costs and expected benefits into a complete business case with ROI, payback period, three scenarios and a reasoned go or no-go recommendation.

    data-drivenanalytical

    Description

    Example scenario

    A team wants to introduce an AI tool for 50,000 euros per year and needs approval from the CFO for it. The skill creates a business case: investment costs from license, onboarding and training, quantified benefit from 120 hours of time saved per month multiplied by the hourly rate, an ROI of 180 percent in the first year, and a break-even point after four months. A worst case scenario and a risk analysis are added. The CFO receives all the figures needed for the decision.

    Steps

    Every step shows who carries it out: icon, colour and label together indicate whether a person acts, whether it runs automatically, whether a result is produced, or whether an approval is required.

    01Person

    The planned project, the estimated costs and the expected benefit are provided.

    02Automated

    03Automated

    04Automated

    05Automated

    06Result

    Key
    PersonAutomatedResultApproval

    In use

    Project description

    Required

    Investment costs

    Required

    Expected benefit

    Required

    Timeframe and assumptions

    Required

    Alternatives

    Optional

    Known risk factors

    Optional

    Output

    An executive summary, problem statement, complete cost breakdown, benefit quantification, ROI calculation, payback calculation, scenario analysis, risk analysis, and a reasoned go or no-go recommendation.

    Skill Text

    # DESCRIPTION
    You create a well-founded business case for an investment decision. Costs and benefits are quantified conservatively, ROI and payback are calculated, three scenarios are worked through, and the result is a clear go/no-go recommendation with a rationale. Address the user in a professional manner throughout. Where facts are missing, explicitly mark your own assumptions as an assumption and keep them separate from substantiated figures.
    
    # INPUT
    - Project description: what is to be invested in or implemented
    - Investment costs, one-time and recurring
    - Expected benefit, quantitative and qualitative
    - Timeframe and assumptions
    - Optional: alternatives, risk factors
    
    # OUTPUT
    Complete business case with the following sections:
    1. Executive summary: core message and recommendation in a few sentences
    2. Problem and solution: starting position and project description
    3. Cost breakdown: one-time and recurring costs
    4. Benefit quantification: monetary and non-monetary benefit, clearly separated
    5. ROI calculation: return on investment over the chosen time horizon
    6. Payback calculation: break-even point
    7. Scenario analysis: best case, base case, worst case
    8. Risk analysis: risks and possible countermeasures
    9. Recommendation: go or no-go, with rationale
    
    # CONTEXT
    - Business cases are calculated conservatively and honestly, no flattering assumptions
    - Qualitative benefit is named but kept clearly separate from quantitative benefit
    - Alternatives are considered, including the option of doing nothing
    - Transparent assumptions increase the credibility of the document
    - If concrete figures are missing, this is stated openly and a plausible assumption is flagged, instead of setting it silently
    
    # WORKING INSTRUCTIONS
    ## Step 1: Understand the project and its strategic context
    Analyze the project description and place its strategic relevance.
    
    ## Step 2: Capture costs completely
    Identify and quantify all direct, indirect and opportunity costs.
    
    ## Step 3: Quantify benefit conservatively
    Calculate the monetary benefit and document the qualitative benefit separately.
    
    ## Step 4: Calculate ROI and payback
    Apply the ROI formula: (benefit minus costs) divided by costs, times 100. Determine the break-even point.
    
    ## Step 5: Analyze scenarios and risks
    Work through three scenarios with different assumptions, identify risks, and formulate a clear go or no-go recommendation.
    
    # QUALITY CONTROL
    [ ] All costs captured completely
    [ ] Benefit quantified conservatively and traceably
    [ ] ROI and payback calculated
    [ ] Three scenarios worked through
    [ ] Risks identified and assessed
    [ ] All assumptions for which no substantiated figures were available clearly marked as an assumption
    [ ] Clear recommendation with rationale
    
    # CONVERSATION START
    Which project do you need a business case for? Describe the plan, the estimated costs and the expected benefit, and I will work out the ROI, payback and scenarios for you.

    Setup

    Step-by-step guides for ChatGPT, Claude, Copilot Studio and Langdock.

    ChatGPT

    OpenAI

    1. Copy the skill text above using the copy button.
    2. Click your profile picture and select "Skills".
    3. Click "Create skill" and paste the copied text as the instruction.
    4. Adjust inputs, outputs and format where your case requires it.
    5. Save the skill. It is available in all chats from that point on.
    Documentation

    Anthropic

    1. Copy the skill text above using the copy button.
    2. Open claude.ai and go to "Skills" in your profile.
    3. Create a new skill and paste the copied text as the instruction.
    4. The skill works in claude.ai, in Claude Code and through the API.
    5. Available on the Pro, Max, Team and Enterprise plans.
    Documentation

    Microsoft

    1. Copy the skill text above using the copy button.
    2. Open Copilot Studio and create a new agent.
    3. Paste the copied text as the instruction.
    4. Connect knowledge sources and tools where needed.
    5. Publish the agent for yourself or for your organisation.
    Documentation

    1. Copy the skill text above using the copy button.
    2. Open the sidebar and click "Add skill".
    3. Paste the copied text directly as the instruction.
    4. Connect the skill to integrations such as Gmail or Slack where needed.
    5. Save the skill and release it for yourself or your team.
    Documentation

    Implementation

    1. Choose the most relevant project

      An investment decision that is genuinely pending and needs approval works best as a starting point.

    2. Set up the skill

      The skill text is copied and filled in with the project description, estimated costs and expected benefit.

    3. Provide figures as precisely as possible

      The more precise the cost estimate and the benefit expectation, the more convincing the business case.

    4. Align the result with stakeholders

      Scenarios and assumptions are reviewed with those involved and adjusted where needed before the recommendation feeds into the decision.

    Last reviewed:

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