Jeff Gothelf - Lean UX: Integrating Design into Agile
Lean UX can eliminate the contractual obligations inherent with specification documents and other deliverables. Designers and developers find it frustrating to put so much effort into a project then not see it ship at the end. Using the Lean UX process, you’re constantly validating your designs, especially early in the process. This motivates the team to work towards the same end goal.