Task

Tasks are the actual units of work the team does when working on a story in a sprint. The story is the item of planning and negotiation, but team often break stories into tasks in order to manage their work. We will seldom discuss tasks in this book, as the internal workings of the scrum team aren’t this book’s main focus.

The tasks for a story are “owned” by the team; the team commits to stories, not tasks. The tasks only exist to aid the team in its development efforts – it is the “doneness” criteria that define the “contract” for the story, not the tasks. Generally speaking, it is nobody’s concern except the team’s who works on what task, or even what the tasks are.