Level of Effort Tasks and Cost Risk

[RiskGuru]

Is it possible for a task duration to be completely dependent on other tasks. I am trying to create a task called Project Management that runs from the start of another task, to the end of a different task. I have tried to make it do this, but it doesn’t seem to expand the days to fit automatically. And when I apply risk to other tasks I would like it to affect the duration of the project management task.

[Intaver Support]

This what is called hammock or level of effort (LOE) tasks and our scheduling engine doesn't support it. The reason is that they cannot be driver of uncertainty in a schedule. For schedule risk analysis, best practice is to remove them before importing into RiskyProject.
For cost analysis, if the LOE task have a non trivial costs associated with them. What we recommend is to run two simulations. The first one to generate a range of uncertainty for the tasks that are driving the LOE task and then apply that as an uncertainty to the LOE task.