How much better than the traditional method where it can take days to get an answer to a simple question, or to even find the right person to ask. The mantra is: Develop, Test, Deploy, Monitor, Feedback and so on.
This sounds application-orientated. In fact, it can apply to the development of any IT solution. Like ITIL, TOGAF and the Seven Layer Reference Model it can be applied to any and all IT activities from development right through to support services.