Product Management: Foundations to Practice · Product-Market Fit
Common PMF Mistakes
Even teams that understand product-market fit conceptually make predictable, repeatable mistakes when pursuing or measuring it. This chapter names the most common ones directly.
One frequent mistake is scaling acquisition spend before product-market fit is established, which simply accelerates customer churn and burns cash faster without fixing the underlying gap between the product and the market. This is sometimes described as pouring water into a leaky bucket faster: the leak (weak retention) is the real problem, and more acquisition volume only makes the consequence of that leak larger and more expensive.
Key Takeaways
- Scaling acquisition before PMF accelerates churn and cash burn without fixing the underlying retention problem.
- PMF is not permanent; it exists on a spectrum and can erode as markets and competitors change.
- No single metric should be trusted in isolation; triangulate retention, organic growth, and qualitative feedback.
- Fit is often uneven across segments, so aggregate scores can hide a strong fit within a specific customer group.