What are burn down charts?

What is a burn down chart?

A burn down chart is graphical representation of "work yet to be completed" versus "time."

The outstanding work (or remaining effort) is on the vertical axis, with time along the horizontal. This chart is useful to predict when all of the work will be completed. To use this chart, you will have to have an integer attribute included in your artifact type and values gathered for this attribute in each artifact.