[Tom Bunch]

At present this is something you'd have to do by modifying a resource assignment. That is, you'll have to first assign a resources to it, then modify the assignment. The other limitation as currently implemented is that you'll have to do some math.

By default, when you modify assignments the effort of the task remains fixed while the duration changes. That is, if you add a second resource to a task, the duration will be halved but the effort remains the same. This what you want here, so so far so good (you can change this setting on the Task: Assignments inspector though).

So now you have a 96 hour task with one or more resources assigned to it, but you want to spread it out over 2 months. To make that happen, we need to figure out what percentage of the resources' time needs to be spent, on average, to get us there ("A"). We define a month as 160 hours, 320 * A = 96, solve for A -> 30%. Or 15% of two resources.

A bit cumbersome. We have been looking at a way to do it in a more direct fashion by simply feeding the app separate values for effort and duration and completely unlinking them. The trick is figuring out how do to that without making the interaction between resource efficiency, resource units, assignment percentages, task effort, and task duration even more complex and difficult to understand.

-Tom