Roles dev team product owner scrum master Sprint zero Trial run. Product backlog The product backlog is a living artefact, higher ranked items should be more refined. It is a placeholder for a conversation. Each refined story in the sprint must have a weight/complexity for planning purposes. These estimates must be done by the people actually doing the work. They should also have a business value and the product owner must share a clear objective/vision for the forthcoming sprint. [Read More]