These charts help to keep track of the progress of the sprint. Burn up charts indicates the amount of work completed in the sprint and the burndown chart indicates the amount of work remaining in the sprint

The Product Owner determines the amount of remaining work and compares it to the remaining work of the previous Sprints and forecasts the completion date of the project.

In the Burn-Down chart, the vertical axis (remaining work) shows the amount of work (which is a sum of all the estimates for each item in the Product Backlog), and the horizontal axis shows the amount of time PASSED from the beginning of the project or the number of Sprints passed.

We USUALLY add another line to present the uniform distribution of the volume of the work ACROSS the initially estimated number of sprints. This line acts as our planned progress and will be used to compare to our actual values.

In the above chart, we can expect the project to be completed earlier than initially planned.

In the Burn-Up chart, the vertical axis is the amount of work and is measured in units or story points, and the horizontal axis is time, usually measured in days.

Each day you can see the amount of work completed and the total amount of work. The DISTANCE between the two lines is thus the amount of work remaining. When the two lines meet, the project will be complete. This is a powerful measure of how CLOSE you are to completion of the project.