The organizers of Lean Startup believe that startups exist not to make stuff, make money, or serve customers - they believe that they exist to learn how to build a sustainable business.
They feel that this learning can be validated scientifically, by running experiments that allow us to test each element of our vision. "Lean Startup" is a methodology built around maximizing validated customer learning thought build/measure/learn iteration loops. It isn't just about how to create a more successful entrepreneurial business - it's about what we can learn from those businesses to improve everything we do. It's ultimately an answer to the question "How can we learn more quickly what works, and discard what doesn't?"
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