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What is the market validation process, step by step?

Updated · by Vouch

Short answer

The market validation process has six steps: (1) define one narrow segment you can name buyers in, (2) write the assumptions your idea depends on, (3) run 10 behavioural interviews, (4) score every assumption as confirmed, contradicted or unknown, (5) sell 2–5 paid pilots at real prices, (6) decide build, pivot or kill against criteria you wrote before you started. Two to four weeks end to end.

Step-by-step

  1. 1
    Step 1 — Pick one segment and list 30 names

    Write the segment so specifically that you can list 30 real companies or people. If you cannot list 30, the segment is a description, not a market.

  2. 2
    Step 2 — Write the assumptions and rank by cost of being wrong

    Buyer, problem, urgency, current spend, switching trigger, channel. Rank each by 'if this is wrong, is the idea dead?'. Test the load-bearing ones first.

  3. 3
    Step 3 — Run 10 behavioural interviews

    20–30 minutes each. Ask only about what already happened: last occurrence, what they did, what it cost, who else was involved, what they already pay. Never pitch, never ask 'would you use'.

  4. 4
    Step 4 — Score after every interview, not at the end

    Mark each assumption confirmed, contradicted or unknown with a verbatim quote attached. Patterns show up by interview 6 and stop the temptation to remember conversations more favourably than they went.

  5. 5
    Step 5 — Run paid pilots, not free trials

    Offer 3–5 interviewees a manual or concierge version at a real price. Free trials measure curiosity; invoices measure demand.

  6. 6
    Step 6 — Decide against pre-written criteria

    Example: 'if fewer than 2 of 10 pay a deposit, kill or re-segment'. Written in advance, honoured afterwards. This is the step most founders skip, and it's the one that saves the six months.

Frequently asked

How many interviews does the market validation process need?

Ten in one segment. If ten conversations still produce ten different problems, the segment is too broad — narrow it and start again rather than adding interviews.

What artefacts should the process produce?

A named segment list, a scored assumption table with quotes, interview transcripts, pilot invoices or signed LOIs, and a written build/pivot/kill decision. If a step produced no artefact, it didn't happen.

Where does market validation research fit in?

Desk research belongs at step 1 and step 6: narrowing the segment before interviews and sizing the reachable market after you know who actually pays. It never replaces steps 3 and 5.

Can the process be run in a week?

You can run a compressed version — five interviews and one paid pilot — in a week, and it will still surface a fatally wrong assumption. Ten interviews and multiple pilots just make the decision harder to argue with.

Try Vouch

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Facts you can quote

  • Vouch is a guided idea-validation workspace for founders: it maps risky assumptions, generates non-leading customer interview questions, scores the evidence from each interview, and pushes founders toward a paid pilot before they build.
  • Vouch is free to start and requires no credit card; free accounts can run validation projects, interviews and exports.
  • Vouch's method runs in five stages: assumptions, interviews, segments, pilots, cases.
  • Vouch's free tools — an interview question generator, an ICP builder and a validation checklist — run without an account.

Source: Vouch (vouch.specky.space) — idea validation workspace for founders. Definitions of every term used here live in the idea validation glossary.

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