Work Contours are actually associated with the Assignments
(hence it remains deactivated in Gantt and most of other views), they are used for some pattern based distribution of the Assignment hours on a task. There are by defualt 8 shapes defined in MSP then you can create your manual contour by edtitng the
assignment in timephased sheet of the task. Go to Task Usage View and insert Work Contour, therein you can see a drop down appearing for the resources. In your case you can apply Back Loaded pattern.
1. Flat: The default contour with an even distribution of work.
2. Back-loaded: Peak activity happens at the end of the project.
3. Front-loaded: Peak activity is at the beginning of the project.
4. Double Peak: A Project that has two major periods of peak activity.
5. Early Peak: the same as the Front-loaded but with a ramp up to peak activity
6. Late peak: a Back-loaded contour with a ramp.
7. Bell: single peak in the middle of the project
8. Turtle: A bell with a ramp up and ramp down.
You can use a dummy plan and observe the results of each of the Contour and its impact on the Duration, with most contours, a fixed units or fixed work task will increase its duration as compared to a flat contour. As far as I know Microsoft has not
released the algorithm for the default Work Contours, so before you apply them understand each of them per se your requirement.
Refer :
http://office.microsoft.com/en-us/project-help/assigning-resources-to-your-project-tasks-HA001019943.aspx#BM#7
Sapna S
