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The Lean Startup
Eric Ries
The TL;DR
Startups are not smaller versions of large companies; they are experiments conducted under conditions of extreme uncertainty. Ries's Build-Measure-Learn loop minimizes the time between hypothesis and validated learning. An MVP is the smallest possible test that teaches you something real about customer behavior — not a prototype with fewer features. Vanity metrics (total signups, page views) lie; use actionable, accessible, auditable metrics that reflect real progress. Innovation accounting proves the growth engine is improving, not just that the team is busy. Pivot or persevere based on data at regular intervals, not when the money runs out. The approach transformed how new products get built worldwide.
Core ideas
- 1Build → Measure → Learn — minimize the loop's cycle time.
- 2MVP = the smallest test that produces validated learning.
- 3Vanity metrics lie. Use actionable, accessible, auditable metrics.
- 4Pivot or persevere based on data, on a regular cadence.
- 5Innovation accounting: prove the engine is improving, not just busy.
Key quotes
"The only way to win is to learn faster than anyone else."
"If we do not know who the customer is, we do not know what quality is."
"Success is not delivering a feature; success is learning how to solve the customer's problem."
Apply it this week
- →Define one validated-learning hypothesis per cycle.
- →Add a quarterly pivot-or-persevere review.
- →Replace one vanity metric on your dashboard this week.
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