Your forecast needs a harder question.

A forecast can balance perfectly and still tell you very little about how a business is performing or what its next stage of growth will require. The real test is the chain of assumptions underneath it.

Whether you are reviewing an established business, planning a launch or preparing for investment, ask what has to be true for the revenue to happen. How many customers? At what price? Can you deliver at that volume? What does it cost to serve them? When does the cash arrive?

Start with the driver, not the target.

A revenue target is an ambition. A model becomes useful when you can trace that ambition back to customer behaviour, sales capacity, delivery constraints and evidence. A percentage growth assumption alone cannot do that work.

For an existing business, compare the model with actual results. Look at which products, customers or activities generate contribution, where costs have changed and whether the forecast reflects current capacity. For a new venture, make the assumptions and the evidence still needed equally visible.

Put the downside on the page.

Test what happens if sales take longer, margins narrow or customer payments slip. Look at the combined effect on cash, not just each sensitivity in isolation. A profitable plan can still run out of money.

Make the story and the numbers agree.

If the deck promises rapid expansion but the model contains no additional people, working capital or launch costs, the case has a gap. The narrative, operating plan and financial model need to describe the same business.

The aim is a model you can use to make decisions: where to invest, what to improve, how fast to grow and when extra cash may be needed. Update it as the evidence changes.