Cover of The Lean Startup

The Lean Startup

Eric Ries

3 ideas

  1. Build-Measure-Learn Feedback Loop

    Turn ideas into a minimal product, measure how real customers respond, and learn whether to persevere or change course — then repeat as fast as possible. The goal is to minimize total time through the loop, not to optimize any single phase, because learning is the true output of a startup.

  2. Minimum Viable Product Tests Assumptions

    An MVP is the version of a product that allows a team to collect the maximum amount of validated learning about customers with the least effort. Its purpose is not to ship a smaller product but to begin the process of learning by testing the riskiest assumptions with real users as early as possible.

  3. Vanity Metrics Hide Real Progress

    Gross numbers like total registered users or cumulative downloads create a flattering illusion of growth while concealing whether the business actually works. Actionable metrics tie cause to effect through cohort analysis and split tests, so teams can attribute outcomes to specific changes rather than to ambiguous totals.

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