Your business model isn't set in stone: How to stress-test it

A business model goes stale without anyone noticing, because revenue holds while margin slips. The stress test takes a day: draw the model as it actually works, find the box carrying the most risk, and play through two alternatives before deciding anything.

Three years ago you had a business model that worked. It probably still does.

But customer expectations have moved. Competitors have arrived. Technology has made something cheap that used to be expensive, and something you charged for has become a given.

Most smaller companies never test their business model. Not regularly, not at all. They say it works, and they leave it alone.

But something working does not mean it is the best you could do. It means it has not stopped working yet.

What a business model actually is

Let us be clear about the term. A business model answers five questions:

• Who do we serve?
• What do we solve for them?
• How do we deliver it?
• How do we make money on it?
• What does it cost us?

That is not the same as a strategy. It is the underlying structure for how you create value and get paid for it. And it can change without you changing what you do.

Draw it as it actually is

The Business Model Canvas is nine boxes on a sheet of paper: customer segments, value proposition, channels, customer relationships, revenue streams, key resources, key activities, key partners and cost structure.

Spend half an hour filling them in. One requirement: draw the model as it actually works, not as it appears in the material you send the bank.

This is usually where the exercise turns uncomfortable. Most people discover their real customer segment is narrower than they say, and that a meaningful share of revenue comes from something that appears nowhere in the strategy.

Find the box carrying the risk

The nine boxes are not equally important. One of them usually carries most of the risk, and that is what the stress test should hit.

Ask four questions:

What happens if our largest customer leaves? If that genuinely hurts, the risk sits in customer segments.

Do our costs scale as fast as our revenue? If they do, you cannot grow your way out of the problem. The risk sits in cost structure.

Could a competitor copy our value proposition in six months? If so, price eventually becomes the only lever anyone competes on.

Do customers pay before or after we incur the cost? If after, you are financing them, and the risk sits in revenue streams.

There is rarely more than one place where the answer genuinely hurts. That is the box you work on.

An example with numbers in it

A design studio made money on hours. More work meant more revenue, but also more working time, and the best designers were always booked.

The model looked like this: the customer segment was smaller companies, the value proposition was high-quality design, revenue came from an hourly rate of around 150 euro, and costs were essentially salaries.

The problem was not hard to spot. Costs grew as fast as revenue. Growth meant hiring, and hiring meant risk.

They played through three alternatives: a subscription to design capacity, selling finished templates, and licensing their component library to other studios.

They chose the subscription. A fixed monthly amount for an agreed number of hours, paid whether or not the hours get used. Six months later around 60% of revenue came from it, and it was predictable. The same designers could cover more clients, because capacity could be pooled instead of locked to one job at a time.

They did not change what they did. They changed how they got paid for it.

Notice what actually happened. They moved the risk of fluctuating demand off themselves and onto the customer, and the customer paid willingly, because in return the customer got guaranteed capacity. That trade is what a good business model change consists of.

Run it as a day, not as a project

Morning, two hours. Draw the current model. Get the numbers out: contribution margin, customer concentration, payment terms, churn.

Lunch until two. Ask the four risk questions. Agree which box carries the risk, and write one sentence on why.

Afternoon, two hours. Pick two alternative patterns that address that specific box. Draw each as a complete model, not as an idea. Work out what they do to costs, to willingness to pay, and to your ability to scale.

Last half hour. Decide what you test first, and what has to be true for it to work. Not what you change. What you test.

The patterns available to you, and which kind of problem each one solves, are covered in 66 business model patterns. To run it as a structured process rather than in a single day, the phases are described in Rethink NOW.

The mistake that costs most

The most common error is switching pattern because another one sounds better, rather than because it solves the box carrying the risk.

Subscription is not better than hourly billing. It is better if the problem is unpredictable revenue and idle capacity. If the problem is instead that customers could switch to a cheaper supplier tomorrow, the subscription solves nothing, and you have spent six months on the wrong thing.

Find the risk first. Choose the pattern second.

Why the model can be simulated rather than guessed

The reason most stress tests end in a hunch is that the alternatives never get worked through. They get discussed.

In 360° Sprint the business model is a node on the board, and every node is versioned automatically with a diff, so an alternative can be played through and rolled back field by field without losing the original model. Change the value proposition, point the chat at the node and ask for an analysis, and it builds on the fields as they stand now, not on the old assumption.

That makes it practical to keep two models side by side, which is the whole precondition for choosing between them.

The six underlying shifts these patterns move along are covered in six fundamental shifts.

You do not need outside help to start. You need a large sheet of paper, nine boxes and an honest afternoon.

The whole subject, from what a business model is to when it needs changing, is collected in business model: what it is and how to change yours.