Pawel Huryn's list divides product validation into two tiers. The first covers 14 quick experiments needing no working product: Email Campaign, Fake Door, Facade, Pinocchio, Landing Page, Explainer Video, Pre-Order, Letter of Intent, and Crowdfunding, testing value proposition, pricing, and messaging using an XYZ Hypothesis format from Alberto Savoia's The Right It, expressed as at least X percent of Y will do Z. The second tier covers four Minimal Products, Piecemeal, Concierge, Wizard of Oz, and Single Feature Product, costing more but delivering real customer value and letting founders test usability alongside pricing and messaging too. Huryn closes with common mistakes: trusting others' opinions at face value, relying on secondhand data, and building a full product just to test an idea.

Founders and product managers who are burning cash building features nobody wants get a concrete menu of cheaper alternatives, organized by cost and effort rather than presented as one generic idea to just run an experiment. The XYZ Hypothesis format gives teams a specific, falsifiable way to phrase what they're testing, which avoids the common trap of running an experiment without first defining what result would actually count as validation or invalidation of the idea. Because the list distinguishes Pretotypes that require no product at all from Minimal Products that deliver some real value, it helps a team choose an experiment that matches how much of their idea is actually still uncertain, rather than defaulting straight to building a full feature.