Planning backwards in MS Project I need to plan some activities backwards from a fixed deadline. I used SF dependencies for that, but there's a slight problem. Let's say I have the following simple plan: 1 Milestone 2 Activity A 2 hours 1SF 3 Activity B 9 hours 1SF 4 Activity C 1 hour 2SF;3SF I expect Activity C to start before BOTH Activity A and B (i.e., 9 hours before Milestone), but it starts before Activity A, only 2 hours before Milestone. Is there a way to force MS Project to respect both constraints?

You can use standard FS relations for predecessors, and set task constraint type 'As late as possible':


1 milestone - prerequisites: 2,3
2 Activity A - 4
3 Activity B - 4
4 Activity C


You should set 'as late as possible' constraint on tasks 2-4, and set task 1 to the required fixed date ('start no earlier than' constraint).