A burndown chart is a graph of work remaining over time. Teams use it—most often during a sprint—to compare actual progress with a planned path and discuss whether the remaining work can be finished in the available time.
Time normally runs along the horizontal axis. The vertical axis measures remaining work in the team’s chosen unit, such as work items, story points, or hours. A planned “ideal” line is compared with an actual line based on the estimates and status of the work being tracked.
What a burndown chart shows
A typical chart starts with the total estimated work at the beginning of an iteration and trends toward zero by its planned end. The chart is a visualization of remaining work, not a complete account of everything happening in a project.
- Horizontal axis: elapsed time, often the days in a sprint.
- Vertical axis: remaining effort or work, measured with the team’s selected unit.
- Ideal line: a planned guideline showing a steady path from the starting amount to zero.
- Actual line: the remaining work calculated from recorded work-item status and estimates.
The unit matters. A chart measured in story points cannot be compared directly with one measured in hours, and a team should keep its estimation method consistent within the planning period.
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How to read the two lines
Actual work near the ideal line
When the actual line stays close to the guideline, progress is broadly tracking the plan. That does not prove that the sprint goal will be met, but it is a useful prompt for a quick status conversation.
Actual work above the ideal line
An actual line above the guideline means more work remains than the plan expected at that point. The sprint may be at risk, or the team may have added scope. Check the work items and the sprint goal before drawing a conclusion.
Actual work below the ideal line
A line below the guideline indicates that recorded remaining work is lower than the ideal path. It may reflect faster progress, smaller estimates, or an update to the work rather than a reliable prediction of early completion.
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A sudden step down
A sharp drop can occur when several items are completed or estimates are updated in a batch. It is a signal to investigate how the data was entered; it is not, by itself, evidence of a sudden change in productivity.
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Use the chart to support a short progress and forecasting discussion. It can reveal that remaining work is not declining as planned and help the team decide whether to clarify scope, remove impediments, or revise its forecast.
It cannot independently explain why work is late, show whether the delivered work is high quality, measure customer value, or guarantee that the sprint goal will be achieved. The chart also does not provide a fair stand-alone assessment of an individual or team. Interpret it with the sprint goal, work-item details, and the team’s conversation.
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Common types of burndown chart
| Type | Planning horizon | Best use | Important consideration |
|---|---|---|---|
| Sprint burndown | One iteration or sprint | Monitor remaining work against the sprint plan | Useful for short-cycle conversations; changes to sprint scope can distort the line. |
| Epic burndown | A larger body of related work | Track progress toward completing an epic | Requires estimates and status that remain meaningful across multiple iterations. |
| Release or version burndown | A planned release or version | Discuss whether the remaining work fits the release timeframe | Longer horizons increase the effect of changing scope and estimates. |
Choose the horizon that matches the decision being made. For frequent scope changes, a burnup chart may be clearer because it separates completed work from the total amount of scope.
Burndown versus burnup
A burndown emphasizes what remains. A burnup chart usually plots completed work and a total-scope line, making additions or removals of scope easier to see. If the main question is “How much is left?”, a burndown may be the simpler view. If the question is “What changed in the total commitment, and how much has been completed?”, a burnup often communicates that more clearly.
How teams use one during a sprint
- Set the starting point. Add the sprint’s selected work and estimates before or at the start of the iteration.
- Record work consistently. Update item status and remaining estimates using the team’s agreed rules.
- Review the chart with context. Compare the actual line with the ideal line, then inspect blocked items, newly added work, and estimate changes.
- Act on the discussion. Resolve an impediment, clarify an acceptance condition, negotiate scope, or revise the forecast when the evidence supports it.
- Inspect the outcome. At the end of the sprint, compare the result with the sprint goal and what was actually delivered, rather than judging success from the line alone.
Using a digital tool such as Jira
Jira provides a burndown report for Scrum boards that tracks remaining sprint work. The exact calculation and display depend on the board’s configuration, issue estimates, and status updates, so a Jira report should be treated as an implementation of the general concept rather than a universal definition of every burndown chart.
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Before relying on a digital chart, verify which issues are included, which estimation field is used, how completed work is recorded, and whether scope can be added after the sprint begins. A chart can look precise while reflecting incomplete or inconsistently updated data.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common interpretation mistakes
Treating the ideal line as a performance target
The ideal line is a planning aid, not a productivity quota. Real work rarely decreases at a perfectly even rate, and forcing the line can encourage premature status changes or distorted estimates.
Assuming a late line proves poor execution
More remaining work can result from added scope, clarified requirements, re-estimation, or blocked work. Inspect those possibilities before attributing a cause.
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Confusing completed tasks with delivered value
Closing many small items does not necessarily mean that the most valuable part of the sprint goal is complete. Pair the chart with prioritization and outcome information.
Ignoring data quality
Stale statuses, missing estimates, and batch updates can make the trend misleading. Consistent definitions and updates are prerequisites for a useful chart.
Is a burndown chart required by Scrum?
No. Scrum Alliance describes a burndown chart as an optional tool, not a formal Scrum artifact. A team may use one when it improves transparency and conversation, or choose another way to inspect progress toward its goal.
Quick Recap
When to choose another view
- Choose a burnup when changing scope must be visible.
- Use a cumulative-flow diagram when the key issue is work moving through workflow states and possible bottlenecks.
- Use a task board and sprint-goal discussion when item-level blockers matter more than a numerical trend.
- Use delivery and outcome measures when stakeholders need evidence of value, quality, or customer impact rather than remaining effort.
Practical checklist
- Is the time period clearly defined?
- Is the vertical-axis unit understood by everyone viewing the chart?
- Are estimates and statuses updated consistently?
- Can the team identify scope added or removed during the period?
- Are blocked items and the sprint goal discussed alongside the graph?
- Is the chart being used for shared inspection rather than individual performance ranking?
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