You can only graph something which accumulates over time on the vertical axis against time on the horizontal axis.

The only things that are candidates for the accumulating certical axis are duration, work and cost.

Usually, the work and cost of a task are derived from the work and cost of the assigned resources.

Of course, it is also possible, but not recommended, to assign work and/or cost to a task without a resource assignment.

If you are not resourcing the tasks then you will not have any work against any task, and probably also no cost, so you have nothing which accumulates to graph.

Early curves can be achieved by making both the task and the accrual as early as possible, and late curves the opposite.

As suggested above, you could create a fictional resource called "$1 per day" with that rate and assign it to every task. You could make it earlier by setting the resource accrual to the start of the tasks, and then graph cumulative cost and that would be basically the same thing as cumulative duration. To get the early version of this you could use the tasks all scheduled ASAP without any resource leveling. To get the late version of this you could set all tasks to ALAP, as well as delaying tasks by leveling if necessary. But cumulative duration is a meaningless metric, so why bother?

You can make various S shaped cumulative curves, depending on the timing of the tasks and the accrual, and also especially on which quantity is accumulating. But S curves of anything, early or late, while perhaps useful for other purposes such as cash flow, do not provide any sensible or useful measure of progress. So it is just eye candy for the client.

Rafael,

The FREE S Curve Macro Download is not available on the rapidshare. Can you plesae reload it.

Rohit