Hello

I have dozens of summary tasks (lets call it ST) which are comprised of sub-tasks of different durations (d).

e.g.

ST_1
Task 1
SubTask1a --> d1
SubTask1b --> d2
Task 2
SubTask2a --> d3
SubTask2b --> d4

ST_2
Task 1
SubTask1a --> d5
SubTask1b --> d6
Task 2
SubTask2a --> d7
SubTask2b --> d8

The only thing I know is that the "Task_1" for ALL my summary tasks should finish on date X, i.e. Subtask1b should finish exactly on date X.

Can I implement this dependency WITHOUT using a "Must Finish On" constraint? Reason is I want to be able to change the date X many times and I would like not to have to manually update hundreds of tasks. Ideally I would like to just update one date at one place and then automatically the planning of related tasks to be updated automatically.

I would like to use a task of 0 days and "synchronize" all my "Task_1" with this date. However I cannot make it work!


Let me know if someone can help!
Thanks