Design-driven development Wikipedia
Design Driven Development (D3) is an agile-based process for creating innovative requirements to build better solutions. It works closely with SCRUM and Extreme Programming (XP) for managing and implementing those requirements. Also it can work with non-agile processes such as RUP.
It is based on the following philosophy:Design is an art of creating beautiful, elegant, and innovative solutions, which works in the user and customer context.
No process can guarantee a better design; creating the right environment and set of people is the only way to bring innovation.
Design is an accident that kicks in at conception, and D3 creates maximum opportunities to make accidents happen.