Foundations
What is Problem-Solution Fit?
Understanding the first stage of product validation: why most products fail because the problem was never validated, and how to avoid that mistake.
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Articles and guides on evidence-based product validation. Understand the problems ProductBooks diagnoses and the frameworks that underpin each assessment.
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Foundations
Why Products Fail Before Achieving Market Fit
The common patterns that cause products to stall between early adoption and real product-market fit, and what evidence you need to progress.
Read articleBusiness Model
Founder Dependency Risk: Why Your Business Breaks Without You
How to identify and measure the risk that your business depends on the founder for revenue generation, delivery, and core operations.
Read articleGrowth
Go-to-Market Validation: Evidence Before Execution
Why go-to-market strategies fail without validated demand, and how to test your acquisition and monetisation assumptions before committing budget.
Read articleFrameworks
Evidence-Based Product Decisions: A Framework for Founders
How to replace assumptions with evidence at every stage of product development, using structured evaluation methods.
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