if you are working with MS PROJECT 2013 (or 2010), you may want auto linking Tasks! First I’ll show you what’s happening if you do not turn on this feature. I will create 3 Tasks and I’ll link them:
I’ll insert New Task between Task2 and Task 3:
As you can see this new Task is without Predecessors. Now I’ll go back to my first three Tasks:
and I’ll turn on this feature:
Now, I’ll insert New Task and I’ll get:
As you can see this New Task has Task 2 as Predecessor, and Task 3 has this New Task as predecessor!
OK. Now I’m going to move New Task behind Task and I’ll get:
Now this New Task has the same Predecessor (it is Task 2), but Task 3 has two Predecessors, Task 2, and New Task.
Now I’ll add a brand new Task ad the end of the Project:
As you can see, it doesn’t have any Predecessors, not it is Predecessor to any Task. So, that feature is only for moved or inserted Tasks.
And, for the end, let’s suppose that we have, for example two Tasks with Start to Start relationship:
Now, I’m going to insert New Task between Task 1, and Task 2:
As you can see, nothing happens! So this feature works only for Finish to Start relationship!