Validation

Validating a business idea: the 5-step test

You validate a business idea in five steps. First: verify in ten conversations that the problem really exists. Second: estimate the market size. Third: test whether strangers would pay. Fourth: run the smallest possible real test. Fifth: define in advance the criteria under which you stop. Cost: mostly time. Duration: 2–4 weeks.

Step 2 in detail: competitor analysis in 5 steps, on no budget →

The five steps

Verify the problem in 10 conversations

Talk to ten people from your target group. Do not pitch your solution. Ask about their everyday life: How do they handle the problem today? What does it cost them? What have they already tried? If fewer than half describe the problem as annoying and unsolved, that is a warning sign.

Size the market, rough is fine

You do not need a study, you need an order of magnitude: How many potential customers exist in your target region? What would each pay per year? Multiply both. Is the result large enough for your goals? A side business needs a smaller pond than a venture-scale startup.

Test willingness to pay

Interest is cheap, money is honest. Ask for a concrete commitment: a pre-order, a deposit, a signed letter of intent, or at least an email sign-up with a stated price. "I would totally buy that" without commitment counts as a no.

Run the smallest real test

Build the smallest thing that delivers real value: a landing page with a buy button, a manually fulfilled first order, a pop-up stand. The goal is a real transaction with a stranger. One is worth more than a hundred survey answers.

Define kill criteria in advance

Decide before testing what result makes you stop or pivot, e.g.: "Fewer than 3 pre-orders out of 50 contacts by day 30." Written down in advance, these criteria protect you from the most expensive founder mistake: carrying on because you have already invested so much.

Step 4 in detail: how to build an MVP, the smallest version that proves something →

This is how an assessment sees it

Example: an idea after step 3. Problem confirmed, market fine, but the minimal test is still missing. Exactly this pattern shows up as scores:

Problem verified8.5

Market sized7.0

Willingness to pay5.5

Minimal test3.5

Frequently asked questions

How long does it take to validate a business idea?

A first solid validation is doable in 2 to 4 weeks: around 10 conversations with potential customers, a rough market estimate and a small willingness-to-pay test. Full certainty never exists. The goal is to resolve the biggest unknowns early and cheaply.

Is positive feedback from friends and family enough validation?

No. People who know you rarely reject you honestly. Only signals from strangers count: a pre-order, an email sign-up, a paid first appointment. Rule of thumb: only when a stranger invests money or committed time do you have a real signal.

What is the difference between validation and market research?

Market research describes the market (size, trends, competitors). Validation tests your specific assumption that someone will pay for your solution. Both belong together: research tells you whether the pond is worth it, validation whether the fish bite at your bait.

When should I abandon an idea?

When a pre-defined kill criterion is met, for example: fewer than 2 out of 10 interviewees recognise the problem as urgent, or after 30 test contacts there is not a single pre-order. Without criteria defined in advance, you will talk yourself into any result.