Scrum is really simple, barely a process, more a framework. The hard
work in using Scrum is fixing the things that it exposes, actually
inspecting the things that it makes transparent and adapting to
optimize the results and the organization that produces the results.

Scrum is not the organization that produces the results, or the
amalgam of procedures, tools, automation, and standards that are
implemented as a result of the inspection, as part of the adaptation.
Scrum is the very simple mechanism that helps an organization be more
effective in accomplishing its goals.

I've been following the threads about type N, A, B, C and advanced
Scrum. Although these may represent the engineering, personnel, and
product management practices that an organization adopts as a result
of Scrum's inspect and adapt, they aren't Scrum. I think we are
mistaking the consequences of Scrum with Scrum itself.

What may be most destructive about these supposed extensions is that
they will divert people from the real work of Scrum ... seeing what is
going on in their organization and going through the change process to
become effective. And learning how to continually inspect and adapt to
keep their organization's practices optimal. Instead, people may think
that all of these things that use the Scrum name are advances in
Scrum, templates that they can mimic and then, amazingly, they are
advanced development organizations, also.

We are running the danger of any small process. People want to make it
bigger. Well, Scrum isn't bigger. Each organization's total ability to
build complex products is certainly bigger, and hopefully continually
evolving, but it isn't Scrum.

Keep Scrum Simple.
Ken