In a series of video interviews, Jeff Sutherland shares his secrets of Scrum.
In one interview he talks about the definition of ready. "Ready" means the team can immediately act on the user stories in the sprint. The team is not discussing requirements or trying to figure out the architecture, instead they instantly start to implement the story.
Mr. Sutherland estimates that only one percent of Scrum teams have a definition of ready. And being in the ready state, increases velocity by 50%.
A couple years ago I coached a team that started sprints and completed few stories. They often called meetings and discussed requirements, thus they completed only a fraction of the stories. How did we smash this roadblock?
We created a definition of ready. The team pulled stories into a sprint only when stories satisfied our definition of ready. The result? We increased velocity by 56%.