Discover and Validate a New Product Idea
Product & Design · 2–4 weeks · Intermediate
The job
Move from a vague product idea to a validated concept with evidence, using a structured discovery process that kills bad ideas early and cheaply.
What the sponsor gets
Each canvas and map from this playbook — Lean Canvas, Persona Canvas, Jobs-To-Be-Done Canvas, Value Proposition Canvas, Assumption Map, Experiment Canvas — exports as a PDF, or as PowerPoint on Pro, straight from the session, and the whole run exports as one PowerPoint for the sponsor. Nothing is redrawn.
The method
Articulate the initial hypothesis
Write down what you believe the problem is, who has it, and why existing solutions fall short. Be specific enough that you can be proven wrong.
Tip: The hypothesis should be falsifiable — "there is a market for X" is too vague; "SME consultants spend 5+ hours per week on Y and would pay £Z to eliminate it" is testable.
Create a Lean Canvas
Map your initial business model hypothesis on a Lean Canvas. Force yourself to fill every box, even if some are speculative.
Tip: The "Unfair Advantage" box is the hardest to fill honestly — if you can't, that's a signal, not a failure.
Define the target user
Create a Persona canvas for your primary user. Don't invent demographics — describe behaviours, goals, and frustrations from real conversations.
Tip: If you haven't talked to a real person who has this problem, stop and do that before filling in the persona.
Understand the job to be done
Create a JTBD canvas from 5 user interviews. Focus on the functional, emotional, and social dimensions of what they're trying to accomplish.
Tip: Ask "what were you trying to do?" and "what happened next?" — don't ask "would you use a product that...?"
Map your value proposition
Create a Value Proposition Canvas mapping your proposed offer against the jobs, pains, and gains you've identified. This reveals fit or misfit.
Tip: If your pains and gains don't come from real interviews, you're designing for an imaginary customer.
Identify your riskiest assumptions
Map all assumptions by importance and certainty. The top-right quadrant (important + uncertain) is where your experiments should focus.
Tip: The riskiest assumption is usually about willingness to pay, not about whether the problem exists.
Design validation experiments
Create Experiment Canvases for the top 3 assumptions. Each should produce a clear pass/fail signal within 2 weeks.
Tip: A landing page with a "Buy now" button is a stronger signal than a survey asking "would you buy this?"
Update the Lean Canvas and decide
Review experiment results, update your Lean Canvas with evidence, and make a go/no-go/pivot decision.
Tip: Killing a bad idea is a success, not a failure — you've saved months of building the wrong thing.
The canvases and maps
- Lean Canvas
- Nine boxes from problem and customer segments through to costs and revenue, so a whole business idea fits on one page and its weakest box shows.
- Persona Canvas
- Goals, frustrations, behaviours, motivations and needs side by side, so the person you are designing for is specific enough to disagree about.
- Jobs-To-Be-Done Canvas
- Functional, emotional and social jobs sit apart from pain points and desired outcomes, so the team describes the progress people want rather than the features it plans.
- Value Proposition Canvas
- Customer jobs, pains and gains face the products, pain relievers and gain creators meant to answer them, so fit is something you can check line by line.
- Assumption Map
- Assumptions plotted by importance and certainty, so the leaps of faith that need testing first stand apart from the safe bets.
- Experiment Canvas
- Hypothesis, design, metrics and success criteria come before results and the decision, so the goalposts are written down before anyone sees the data.
What it doesn't do
It doesn't run the room for you or decide for the client. The steps, canvases and duration are a starting point you adapt; the judgement stays yours.