BURN DOWN CHART
A burn down chart is a graphical representation of work left to do versus time. The remaining work is on the vertical axis and the time is along with horizontal. Burn down chart are the run chart of outstanding work.
It is use full for predicting when all of the work is done it is used in agile software methodology for scrum burn down chart are applied for any project containing progress at any time.
Reading burn down chart:
sprint time line
a burn chart for complete sprint is shown above and can be read by following:
|X axis||The project or sprint time line|
|Y axis||The work that need to be completed for the project. The time is estimated by y axis|
|Project start point||This is the farthest point to the left of the chart and occurs at 0days of the project|
|Project end point||This is the point that is the farthest to the right of the chart and occurs on the predicted last day of the project|
|Actual work line is above the ideal work line||if the actual work line is above the ideal work line it means there is more work left than original predicted and project is behind|
|Actual work line is below the ideal work line||if the actual work line is below the ideal work line it means there is more work left than original predicted and the project is ahead|
The above table is the only way of interpreting the shape of the burn down chart.
REMOVING VARIABILITY IN TIME ESTIMATES:
One issue that is noticed in burn down chart is the actual work is below or above the ideal work line depends up on how accurate the original time estimates. This means team constantly overestimates the time requirements. The progress will always appear ahead schedule. If they constantly under estimate the time requirement they will appear behind the schedule.
This issue is corrected by in corpora ting an efficiency factor in to the burn down chart. after the first sprint of the project the efficiency factor can be recalculated to allow more accurate estimates in next sprint .some template automatically calculate efficiency as a project progress. this can used to identify areas where inaccurate estimates consistently.