3 resources from Strategyzer we point founders to, and the questions each answers.
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Why we picked it
The Test Card is a one-page worksheet that forces a vague market-size belief into four fields: what we believe, how we will test it, what we will measure, and what result would prove us right. Fill one out for each cofounder's version of the market and the disagreement stops being a debate and becomes two experiments with clear pass or fail bars. It is free, widely used, and takes minutes to complete, so there is no excuse to keep arguing in the abstract.
From
Strategyzerby Strategyzer (Alexander Osterwalder)one-page worksheet
It converts a differing assumption into a hypothesis plus a concrete metric and a success threshold, so you both agree in advance on what would change your mind.
Writing each cofounder's belief on a separate card surfaces exactly where the two of you actually diverge.
Pair it with the companion Learning Card to record what the test showed, so the decision is documented, not relitigated later.
Why we picked it
A one-page tool for writing down what you have learned about a customer's jobs, pains, and gains, then checking whether your idea actually addresses them. For an outsider it forces you to fill the customer side first, from real research, before you let yourself describe a solution. Print it and revisit it after every batch of interviews.
Why we picked it
A compact guide to interviewing around jobs, pains, and gains without leading the witness. It keeps you from talking about your solution too early and teaches you to listen for what people genuinely struggle with. A handy reference to keep open during your first calls.
