There is a convention in our company that we don't extend the duration of an activity which is on critical path, to capture the activities which have caused the delay in the program in a better way.
We have a WBS and under that WBS (which is named Change Management) we add those extension of that.
So, basically, if activity A with a duration of 20 days is placed on CPM and is going to be finished in 25 days,we are going to create another activity named A+ with a duration of 5 days.
My questions is if activity A has " activity b", " activity C", and " Activity D" as its successors;
what would be the " successors of activity A, after adding activity A+"
And what would be the predecessor and succsors of activity A+.
Is it going to be like this?
A: Succeesros ==> Activity B, C, D, A+
A+ " Predecessor==> A
A+ : Successor ==> B, C, D?
" Is it important if any of activity B, C, or D are driving predecessors for activity A?
this all depends on the real world logic lets take an example of a concrete footing installation
A=excavation
B= form
C= rebar
D= pour
now there is a change which is is A+
is it a change to the excavation ?
is it a change the forming ?
is it a change to the rebar ?
is it a change to the pouring ?
this will determine where A+ should be inserted and will determine the predcessor and successor