Planning & Scheduling and Delay Analysis split into Planning, Scheduling, Forensic Planning, Forensic Scheduling and Forensic Schedule Analysis. Why?

It is a very big question to answer.

simply,

to reduce work effort and distributes to many people so that employee risk is less

being acoountable on mangement of global project buildng sucessful stratgies in a project 

I would say that essense here is that daily followup and analysis must be FEDBACK to the original plans to evaluate its effectivness and nodify them as and whaen required to maintin its effectivness considering actual circumstances.

To fully answer that, anyone will need to write a book. There is far too much into the one question, it seems overly complicated, unnecessarily.