The Lean Startup

How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Businesses

Eric Ries

17 min read
1m 7s intro

Brief summary

Most startups fail by building products nobody wants. The Lean Startup method treats new ventures like scientific experiments, using a Build-Measure-Learn feedback loop to turn ideas into sustainable businesses.

Who it's for

This is for anyone creating a new product or business under uncertain conditions, from startup founders to managers in large corporations.

The Lean Startup

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Why Startups Need a Different Approach

Many people imagine startup success as the result of brilliance, passion, and nonstop effort. That story is appealing, but it leaves out the main reason so many promising ventures fail. A team can be talented, hardworking, and full of good ideas and still build something nobody wants. Under uncertainty, effort alone is not enough.

A startup is not defined by its size, its age, or whether it works in technology. It is any human organization trying to create something new in conditions of extreme uncertainty. That includes a small company in a garage, a team inside a giant corporation, a nonprofit, or even a government agency. If the path forward is unclear, the same basic problem appears: how do you find out what will actually work before time and money run out?

Traditional management does not handle this problem well. Large established companies are built for efficiency, forecasting, and repeatable execution. Startups need something different because they are not just producing goods or delivering known services. They are trying to discover the right product, the right customer, and the right business model at the same time.

That is why entrepreneurship has to be treated as a form of management, but a special kind. The goal is not to follow a fixed plan perfectly. The goal is to learn what customers value and adjust quickly. Instead of assuming the original business plan is correct, teams need a process that helps them test ideas, face reality early, and make steady course corrections.

A clear example came from IMVU, where early assumptions turned out to be badly wrong. The team spent months building technology they believed customers would want, only to discover that many of those features were unnecessary. That painful experience led to a different way of working, built around a repeating cycle: build something small, measure what happens, and learn from real customer behavior. This Build-Measure-Learn loop became the core discipline for navigating uncertainty.

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About the author

Eric Ries

Eric Ries is an American entrepreneur and author known for creating the Lean Startup methodology, a global movement that applies principles like rapid experimentation and validated learning to the process of innovation. He has founded several startups, including IMVU where he was CTO, and has advised a wide range of companies from startups to large corporations like GE on business and product strategy. Ries is also the founder and Executive Chairman of the Long-Term Stock Exchange (LTSE), which is designed to support companies focused on long-term growth.

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