Run nine framework-backed decisions in order before writing code: define the buyer, prove the pain is painful, name the winning angle, scope V1 to the smallest test of the hypothesis, get behavioral evidence (paid pre-orders, signed letters of intent, or credit cards on file from a Fake Door Test), then ship. Most failed startups skipped at least three of those nine. Plan to spend two to four weeks on this. It saves six to nine months of building the wrong thing.
The fast version
Validation is the work of generating real evidence (not vibes) that a specific buyer will pay you for a specific product. The minimum bar:
- 10+ interviews with people who match your buyer profile, focused on what they DID last time they had this problem
- 3+ behavioral commitments: paid pre-orders, signed letters of intent, or credit-card-entered Fake Door Test conversions
- A defended “why now” answer that points to a present-tense trend, not a hypothetical future one
- A scoped V1 that tests one specific hypothesis, not “the product”
Below all four conditions: not validated. Don’t write production code yet. Stay in interview mode.
Why most “validation” doesn’t validate
Open any startup post-mortem on Indie Hackers and you’ll see the same words: “I thought I had validated it.” The founder talked to friends. The friends were enthusiastic. There was a Twitter post that got 100 likes. There were 500 email signups for early access. None of this is validation. It’s interest, which correlates poorly with revenue.
The four conditions above filter out everything except behavioral evidence. Behavioral evidence is the only kind that holds up after launch.
The 9-step process
ShipFit’s 9-step pre-code playbook sequences validation as a series of gated decisions. Each step has a defensible answer or you stop:
- Worth Building? Market verdict + signal confidence + key opportunities
- Who Pays? Defined buyer with budget authority and pain
- What Hurts? Above-the-line problems scored by frequency × intensity
- How to Win? The unfair advantage you’ll have at maturity (one of the 7 Powers)
- What’s V1? The smallest test of the hypothesis
- How to Charge? Defended price from Van Westendorp + willingness-to-pay interviews
- Will They Pay? Behavioral evidence via Fake Door Test, Gold/Silver/Bronze signal tiers, or pre-orders
- How to Launch? Channel mix that fits where the buyer already is
- What to Export? Validated playbook handed to your dev tools
The order matters. Step 6 (pricing) needs the buyer from step 2. Step 8 (launch) needs the V1 from step 5. Skip a step and the next one runs blind.
The four methods that actually generate evidence
In increasing order of signal strength:
- Mom Test interviews focused on past behavior. 10-15 conversations minimum. The signal: 3+ unrelated buyers describing the same pain in the same words.
- Fake Door Test with weighted signal tiers. Gold = credit card entered. Silver = demo booked. Bronze = time spent. Worthless = email signup. Weight your conversion accordingly.
- Paid pre-orders at proposed price. 3-5 pre-orders from 30 conversations is meaningful.
- Signed letters of intent for B2B. The friction is the test.
Skip surveys. Stated preference and revealed preference are different species; survey data has near-zero correlation with revenue.
What you walk away with
After 2-4 weeks of disciplined validation, you have a defensible answer to:
- Is the market real? (size + growth + timing)
- Who is the buyer? (named, specific, reachable)
- What hurts? (3-4 above-the-line pains, scored)
- Why us? (one of the 7 Powers, defended)
- What’s V1? (Differentiator + Operational only, Delight cut)
- What’s the price? (Van Westendorp band, justified)
- Will they pay? (behavioral commitments)
That’s the validated playbook. Everything after is execution against an answer the market gave you, not a guess you talked yourself into.
Common mistakes
1. Asking friends instead of strangers. Friends are polite. Strangers tell you the truth.
2. Counting interest as validation. Interest is free. Only commitments (money, time, reputation) count.
3. Pitching too early in interviews. The moment you pitch, the conversation contaminates. Apply the Mom Test discipline.
4. Skipping the buyer-definition step. Validating “should I build this for everyone?” is unanswerable. Pick a specific buyer first.
5. Treating one positive interview as proof. Patterns emerge around interview 10. Below 10, you have anecdotes.
Further reading
- The 9-step playbook, the master pillar this question is the front door to.
- Idea validation, the four-method ladder, deep dive on each evidence method.
- The Mom Test framework, the interview discipline that makes step 1 work.
- Lean Startup validation, the wider framework this process operationalizes.
Related
The Mom Test
The Mom Test is Rob Fitzpatrick's framework for customer interviews that generate real signal. Not praise. Three rules, applied step-by-step, with examples.
Jobs to be Done (JTBD)
Jobs to be Done reframes every product decision: customers don't buy features, they hire products to get a job done. Here's how to apply it without faking it.
The Lean Startup
Eric Ries's Lean Startup, stripped of consultant fluff. Validated learning, Build-Measure-Learn, MVP, pivot or persevere. What it means and where it gets misapplied.
Idea Validation
Most founders confuse idea validation with idea-receiving-encouragement. The two have nothing in common. Here's what real validation looks like, and the four methods that actually produce it.
Market Research
Most founder market research is a TAM slide that nobody believes. The numbers that actually matter are smaller, harder to defend, and tell you whether the market exists for the ten-customer version of your business.
MVP Scope
Most founders ship an MVP that's actually V1.3 with bugs. Real MVP scoping cuts ruthlessly until you can name the one hypothesis V1 proves, and ships a product that tests it.
Product-Market Fit
The state in which a product satisfies a strong market demand such that demand pulls the product through the company. Coined by Marc Andreessen in 2007. Most rigorous measure: 40%+ of active users would be 'very disappointed' to lose the product (Sean Ellis test).
MVP (Minimum Viable Product)
The smallest version of a product that lets you test a falsifiable hypothesis about a buyer's behavior. Coined by Frank Robinson in 2001; popularized by Eric Ries in 'The Lean Startup' (2011). Not a stripped-down launch product. A learning tool.
Frequently asked questions
Can I validate a business idea in a day?
Do I need to validate every idea?
What's the first thing to do when validating an idea?
How is validation different from market research?
Should I validate before or after building the MVP?
Keep exploring
The 9-step playbook from market verdict to ship-ready spec.
The Mom Test is Rob Fitzpatrick's framework for customer interviews that generate real signal. Not praise. Three rules, applied step-by-step, with examples.
The Van Westendorp framework uses 4 questions to surface a defensible price range for any product. Here's how to run it, interpret results, and avoid the cheapest mistakes.
Most founders confuse idea validation with idea-receiving-encouragement. The two have nothing in common. Here's what real validation looks like, and the four methods that actually produce it.
Most founder market research is a TAM slide that nobody believes. The numbers that actually matter are smaller, harder to defend, and tell you whether the market exists for the ten-customer version of your business.
Does each customer make you money? Or cost you money?
The smallest version of a product that lets you test a single, falsifiable hypothesis about a buyer's behavior. Coined by Frank Robinson in 2001; popularized by Eric Ries in The Lean Startup (2011). Often not a working product at all (a landing page, a Wizard of Oz prototype, a manual concierge service). The defining feature: it can fail. If your MVP can't fail, it's not an MVP, it's just a small launch.
For indie hackers who've wasted months on dead ideas. ShipFit forces 9 decisions before you write a line of code. Proven frameworks, exports to Cursor.
If you want a conversation partner, Buildpad. If you want to stop researching and ship, ShipFit. Both solve different problems for different founders. Don't pick on hype.
Ready to make your next product a success?
9 decisions between your idea and a product worth building.