We must avoid the caricature that science means formula or a lack of humanity in work. In fact, science is one of humanity’s most creative pursuits. … - Eric Ries

Successful entrepreneurs do not give up at the first sign of trouble, nor do they persevere the plane right into the ground. Instead, they possess a unique combination of perseverance and flexibility.

The rate of growth depends primarily on three things: the profitability of each customer, the cost of acquiring new customers, and the repeat purchase rate of existing customers. The higher these values are, the faster the company will grow and the more profitable it will be. These are the drivers of the company’s growth model.

Greg set out to change the QuickBooks development process by using four principles: 1. Smaller teams. Shift from large teams with uniform functional roles to smaller, fully engaged teams whose members take on different roles. 2. Achieve shorter cycle times. 3. Faster customer feedback, testing both whether it crashes customers’ computers and the performance of new features/customer experience. 4. Enable and empower teams to make fast and courageous decisions.