But that indicates the project was not planned well since change requests for such a large project would have been expected.
Notably: I only modeled traffic. I am not to blame. ;-)
(I have used that caveat so many times.)
Then the Monitoring and Control process group will evaluate Planning again each time it loops back, so it makes no sense to me their plan failed, multiple times really for each loop. It's even worse knowing that each time they come back to Planning as part of the process they screwed up yet again.
Case in point: it was only 17 months from Trump announcing his candidacy to winning the election - plus his party put up over 20 nominees.