Peter Drucker said, “There is surely nothing quite so useless as doing with great efficiency what should not be done at all.”2 - Eric Ries

Lean thinking defines value as providing benefit to the customer; anything else is waste. In a manufacturing business, customers don’t care how the product is assembled, only that it works correctly. But in a startup, who the customer is and what the customer might find valuable are unknown, part of the very uncertainty that is an essential part of the definition of a startup.

The Lean Startup works only if we are able to build an organization as adaptable and fast as the challenges it faces.

The one envelope at a time approach is called “single-piece flow