X-DreamersStartup ideas · Find your next idea
How to validate a business idea
To validate a business idea, test the problem before you build the product. Find a few people who have the problem, ask what happened the last time they met it, and run a small test that could prove you wrong. These six lessons take you through it step by step, 15 to 20 minutes each, with an exercise you keep.
The six lessons
- 1. Start with a problem, not a product
Describe one recurring problem using a real person, a specific moment and an existing workaround.
15 min
- 2. Ask about the last time
Draft an interview that discovers customer behaviour without selling your solution.
20 min
- 3. Compare problems, not excitement
Choose the next problem to investigate using evidence, access and existing alternatives.
20 min
- 4. Design a test that can fail
Write a small experiment with a decision rule before you see the results.
20 min
- 5. Deliver the smallest useful outcome
Scope a manual prototype that tests value before a full product is built.
20 min
- 6. Decide: continue, change, or stop
Write an evidence-based decision memo and a bounded next step.
15 min
What you will have at the end
An idea worth testing
Common questions
How do you validate a business idea?
Test the problem before the product. Find a few people who have the problem, ask them about the last time it happened and what they did about it, then run a small test with a pass mark you set in advance, such as a clearly described manual pilot. Lessons 2 to 5 take you through each step.
Should I build an app or a prototype first?
Usually not. Deliver the outcome by hand first, with a document, a spreadsheet or your own time, and tell people what is manual. You learn whether they use the result, and what it costs you to deliver, before you write any software.
Go further: free courses we recommend
- Startup School ↗
Y Combinator · 7 weeks · 1–2 hr/week
A practical starting point for evaluating ideas, planning an MVP, finding users and building a company.
Free course. Free account for the programme and progress tools.
- New Enterprises ↗
MIT OpenCourseWare · Self-paced · semester materials
A deeper framework for identifying and sizing market opportunities, developing a business model, and planning a technology venture.
Free lecture notes, tutorial videos and assignments; no registration. Some assigned books may cost extra and are not needed for the exercises here.
- Entrepreneurship – from ideas to reality ↗
The Open University · OpenLearn · Self-paced · guided activities
Explore entrepreneurial thinking and develop an idea into a business proposition through guided activities.
Free course. Free account for tracking, quizzes and participation rewards.
Checked on 19 September 2026
The other paths
- How to find your first customers
Six free lessons on finding your first customers: pick an audience you can reach, say why they should choose you, test one channel and measure.
- Communication skills for founders
Six free lessons in communication for founders: listen well, write messages people can act on, open a talk, pause for questions and pitch with evidence.