Burn-up graph
The close cousin to the burn down graph is the burn up graph. While the burn down graph shows how much there is left, the burn up graph shows how much that has been done. This is even more flexible and easy to start with since you don't need to estimate the whole project from the beginning. You still need to estimate the work before you start working with just that part. The alternative of estimating after it´s done will just be a predictable graph showing the time spent on the project so that is nothing we recommend. If your items are of a similar size there is no need for estimating, just counting is enough.
In the preceding burn up graph diagram you see two dashed lines representing the optimistic and the pessimistic trends. The expected outcome will be somewhere in between. From the graph you are able to draw conclusions about when a certain amount of work will be done...