Re: Is Agile truly scaleable?

Well said, Mr. Ash!!  There is a lot of incorrect information out there because Agile and Scrum are only buzzwords to so many.  "We do two week Sprints, so we are using Scrum to be Agile" is commonly heard.

The four values and twelve principles in the Agile Manifesto http://www.agilemanifesto.org/ are the baseline definition for what can be considered Agile.

Coming about five years before, Scrum was introduced.  Its definition can be found in The Scrum Guide http://www.scrumguides.org/index.html.  More recently, The Nexus Guide https://www.scrum.org/Resources/The-Nexus-Guide for scaling Scrum was released.

I have had less exposure to SAFe, but see it as an attempt to allow organizations to maintain the status quo of non-lean systems via structure while applying some agile features.