A burndown chart is a graphical representation of work left to do versus time. It is very simple, easy to explain and understand. It is often used in agile software development methodologies such as Scrum. However, burndown charts can be applied to any project containing measurable progress over time. Outstanding work can be represented in terms of either time or story points. When tracking using the Burndown chart, teams can use a sprint Burndown chart and a release Burndown chart. It is one of the most important artifacts and a fundamental metric in agile scrum.