During a sprint demo, the customer says that one of the user stories is not ready for customer use. Where checklist should it be from look at to find out what we do?

The burndown chart visually represents the amount of work remaining in a project over time, helping teams track progress. However, it does not provide specific criteria for individual user stories or their readiness for customer use. Thus, it is not the appropriate checklist to consult in this situation.

The Definition of Ready (DoR) sets the criteria for user stories to be considered ready for development before a sprint begins. While it is important for ensuring that stories can be worked on effectively, it does not address the completion criteria for stories that are already in progress, making it less relevant in this context.

The velocity chart measures the amount of work completed by the team during past sprints, providing an insight into productivity. While useful for planning future sprints, it does not contain specific information about the readiness or completeness of individual user stories, thus failing to assist in the current situation.