What is a Burndown Chart? - Definition & Meaning
A burndown chart is a graph that visually plots remaining work against time in a sprint or project. Learn how burndown charts work.
Definition
A burndown chart is a visual graph that plots remaining work (in story points, hours, or tasks) against available time in a sprint or project. The x-axis shows time and the y-axis shows remaining work. An ideal line indicates the expected pace, while the actual line shows the team's real progress.
Technical Explanation
Burndown charts are calculated based on the total estimated scope at the start of the sprint minus daily completed work. The ideal line (also called the guideline) is a straight line from total work to zero. Deviations from this line signal potential issues: a line above the guideline indicates the team is behind schedule, while a line below it shows faster progress. Variations like release burndown charts show progress across multiple sprints. Burnup charts are the mirror image and show cumulative completed work instead of remaining work.
How Refront Uses This
Refront automatically generates burndown charts based on ticket statuses and story points within a sprint. The dashboard shows real-time team progress against the ideal line. AI agents analyze burndown patterns and alert teams when the sprint scope is at risk.
Examples
- •The Scrum team reviews the burndown chart during the daily standup to check whether they are on track for the sprint.
- •The burndown line suddenly rises because extra work was added to the sprint, triggering a discussion about scope creep.
- •A project manager uses the release burndown chart to show the client how many sprints remain.
Related Terms
Frequently Asked Questions
What is the difference between a burndown chart and a burnup chart?
A burndown chart shows remaining work decreasing over time, while a burnup chart shows cumulative completed work increasing. Burnup charts make scope changes more visible because they also display the total scope.
How often should you update a burndown chart?
Ideally, the burndown chart is updated daily so the team has current insight into progress. With tools like Refront, this happens automatically based on ticket status updates.
What does it mean when the burndown line is above the ideal line?
This means the team is completing less work than planned and risks not finishing the sprint on time. The team should discuss whether tasks need to be reprioritized or removed.
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