Jul 05 2022 06:10 PM - edited Jul 05 2022 07:17 PM
Hi All,
Hopefully you can help provide some clarity.
I have a task 'Task A' which has a predecessor 'Task B' with a finish-to-start relationship
Task A can start as soon as Task B is complete.
The issue is that Task A also has 2 predecessors with finish-to-finish relationships (Task C & Task D).
MS Project is reporting the start (and early start) of Task A as the finish date of Task C or Task D (the later) less the duration. Where as realistically Task A can start as soon as Task B is finished but not finish until C & D are finished.
Jul 05 2022 06:59 PM
Right off the bat the second paragraph about 'Task A' having a predecessor of 'Task B' with a finish-to-finish relationship is contradictory. It can't then also start as soon as 'Task B' is complete.
This is how I read your scenario
If you can clarify what you mean, perhaps we can help.
John
Jul 05 2022 07:14 PM - edited Jul 05 2022 07:15 PM
Thanks for the Prompt Reply, Apologies my description was wrong. I should have stated:
I have a task 'Task A' which has a predecessor 'Task B' with a finish-to-start relationship
In the below example I want to show it is possible to start Task A on the 07/07/2022.
Jul 06 2022 08:03 AM
That's better, or at least it now makes more sense.
As set up the predecessors for 'Task A' effectively determine when 'Task A' can start. The driving dependency is the finish-to-finish with 'Task D'. A finish-to-finish dependency means that 'Task A' CANNOT be completed until, in this case, 'Task D' is complete. There is no conflict with the finish-to-start relationship with 'Task B' since that dependency means that 'Task A' cannot start until 'Task B' is complete. It does NOT mean that 'Task A' will start immediately after 'Task B' finishes.
I note that tasks 'C' and 'D' have start-no-earlier than constraints but the start of 'Task B' is apparently defined by the Project Start date. If there is some flexibility in when 'Task B' starts then this dependency configuration will get what you want.
If that doesn't work in your situation, then the only way to have 'Task A' start immediately after 'Task B' finishes is to remove the finish-to-finish relationships.
John
Jul 06 2022 08:05 PM