Ok. This might seem odd for some of you to hear me say this, but it's true.
I'm not going to go into too much detail here, because I have written a way too long thing about it for Scopism, but most frameworks or ways of working just require you to understand and use a few principles.
ITIL - ITSM
That's pretty much all most of us need to do our jobs well. And fundamentally they all agree with each other.
However, if you want to know more about any of these, check out the training options I have available.