The Lean Startup

Eric Ries · 2011

Innovation
Cover of The Lean Startup

Building a Business Through Continuous Experimentation

Eric Ries redefined how startups should be built. Instead of spending months perfecting a product in secret, he argued for rapid experimentation — build a minimum viable product, measure how customers respond, and learn whether to persevere or pivot. This Build-Measure-Learn loop became the operating system for a generation of entrepreneurs.

Before The Lean Startup, the dominant approach was to write a business plan, pitch investors, build the product, and hope customers showed up. Ries drew on lean manufacturing principles and his own painful startup failures to propose a fundamentally different method — one that treats a startup as an experiment, not the execution of a plan.