The Lean Startup by Eric Ries

A startup is a grand experiment = "a human institution designed to create a new product or service under conditions of extreme uncertainty"

Too many startups begin with an idea for a product that they think people want. They then spend months, sometimes years, perfecting that product without ever showing the product, even in a very rudimentary form, to the prospective customer.

Scientific management has been used to optimize processes at the beginning of the 20th century (ford automobiles). It is now used to optimize building the right product, instead of building the product as efficient as possible