The sprint burn down chart is a publicly displayed chart

showing remaining work in the sprint backlog. Updated every

day, it gives a simple view of the sprint progress. It also

provides quick visualizations for reference. There are also

other types of burndown, for example the Release Burndown

Chart that shows the amount of work left to complete the

target commitment for a Product Release (normally spanning

through multiple iterations) and the Alternative Release

Burndown Chart,which basically does the same, but allows to

show clearly scope changes into a Release Content, by

resetting the baseline.