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Steve Blank Invented the Lean Startup. Here Is What Everyone Gets Wrong.

By Steve Blank · Founder Stories · 1 min read

Business plans are fiction. Steve Blank proved it. Then the startup world misunderstood his point.

Key Points

A business plan is untested hypotheses, not facts
Lean startup replaces planning with testing
Most founders use it as an excuse to skip thinking. That is the opposite of the point.

No business plan survives first contact with a customer.

The Business Plan Is Fiction

For decades, business schools taught founders to write 50-page business plans.

Steve Blank looked at the data. Almost none survived contact with real customers.

Test, Do Not Plan

Turn your assumptions into hypotheses. Test them. Pivot when they fail.

This became the Lean Startup methodology. The entire industry adopted it.

No business plan survives first contact with a customer.

What Everyone Gets Wrong

Most founders heard lean startup and thought: do not plan at all. Just build and see.

That is the opposite. Blank wants MORE rigor, not less. Applied to testing, not writing.