Know Who Has Your Problem Before You Build
The free PSF Framework guide: a 5-step process for evaluating problem-solution fit across demographic segments — before you write a line of code.
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5-step PSF scoring process — How to identify which demographic segments experience your problem most acutely, with a scoring template you can fill out in an afternoon.
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Red flag checklist — 8 signals that your validation sample is biased, your problem isn't acute enough, or you're targeting the wrong segment. Catch them before you build.
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Real case studies — Full segment breakdowns from three 250-persona analyses: a habit app, a cashflow planner, and a B2B workflow tool. See how counterintuitive the high-PSF segments often are.
The framework behind every analysis on Modest Idea — distilled into a guide you can use manually.
See the framework in action