Note: This skill is independent analysis and commentary, not a reproduction of the original text. It synthesizes the book's core ideas with modern startup practice, surfaces where frameworks are outdated or incomplete, and integrates perspectives from adjacent disciplines. For the full argument and context, read the original book.

The Lean Startup

"The Lean Startup is not a collection of individual tactics. It is a principled approach to new product development." - Eric Ries

Should You Use This Skill?

Are you building something under conditions of extreme uncertainty?
|-- YES --> Do you know who your customers are?
|   |-- NO  --> Start with Four Steps (Customer Discovery), use Lean
|   |           Startup for iteration speed within that process
|   +-- YES --> Do you have product/market fit?
|               |-- NO  --> THIS SKILL. Build-Measure-Learn loop.
|               +-- YES --> Use Crossing the Chasm for mainstream scaling
+-- NO  --> Are you optimizing an existing product in a known market?
            |-- YES --> Lean Startup principles apply (small batches,