Responsibility

Thus, in a professional setting, the customer orders work to be done while developers do that work with full knowledge that there is more work to come and an expectation that progress will continue at pace. S1

Velocity is a measure of decisions only developers can make. Developers will strive to reach an optimal velocity where functionality and opportunity produced reach a sustainable balance. S6

A customer who asks for less work can save investment. However, a customer who asks for faster work, sub-optimal velocity, is asking for a process that will stall. S5