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Scenario-Based Budget Modelling

Medium

Testing budget allocations under different demand, policy, or economic scenarios.

Finance & BudgetingGovernment & Public Sector

The Pain

Budget planning assumes a single future, but demand and costs vary. When leadership asks what happens under different scenarios, finance teams build one-off spreadsheet models that take weeks. Comparing options side by side requires duplicating work across multiple files.

What's Possible

AI enables rapid testing of budget scenarios: different demand levels, policy changes, or efficiency assumptions. Finance can show leadership clear comparisons across options. Budget planning becomes more robust by considering multiple futures.

Signals This Is Worth Exploring

Budget planning assumes static demand and costs

Scenario requests take weeks to fulfil

Leadership makes decisions without seeing alternatives

Past budgets often proved wrong due to unforeseen changes

Impact

Budget scenarios produced in days rather than weeks

Clear comparison of allocation options under different assumptions

More resilient budgets that account for uncertainty

Finance positioned as strategic advisors rather than number processors

Typical Approach

1

Assess

Identify key variables and scenarios relevant to budget planning. Document current modelling approaches.

2

Pilot

Build scenario capability for one budget area. Test with upcoming planning cycle.

3

Scale

Extend to full budget with self-service scenario testing for budget holders.

What to Watch Out For

Scenarios may be misused to justify predetermined positions

Too many scenarios can paralyse decision-making

Assumptions need clear documentation and governance

Models require regular updates as conditions change

Questions to Think About

Before we talk, you might want to consider:

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What scenarios would be most valuable to test in your budget planning?

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How do you currently handle uncertainty in budget assumptions?

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Who needs to see scenario comparisons and in what format?

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What variables have the biggest impact on your budgets?

Build On This

Once the basics are working, you can expand:

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Sensitivity analysis

Identify which assumptions have the biggest budget impact

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Rolling forecasts

Update scenarios as the year progresses

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Stress testing

Test budgets against extreme but plausible scenarios

Want to explore if this fits your organization?

Book a 30-minute call to discuss your situation and whether this use case makes sense for you.

Book a 30 min call