Start with the drivers
Identify the few variables that move the result: the number of customers served, average project effort, payment timing and major supplier costs. Link a forecast to these drivers rather than presenting a single unexplained total. A scenario should describe a coherent situation, not simply add an optimistic percentage to every line.
Keep estimates testable
Label the source and date of an assumption. Update it when a quotation, customer decision or completed project provides better evidence. Compare the result with the scenario and record why the difference occurred. The purpose is to improve decisions and communication; a forecast does not guarantee a commercial outcome or establish the value of a business.
A short working checklist
- Identify the variables that drive the result.
- Record the evidence behind key assumptions.
- Explain differences between forecasts and actuals.
Further reading
General educational material. Requirements depend on the actual activity and jurisdiction.