Now that I’ve written this, I can see that this will not be more than a sub-part of a question. I would probably condense Ross et. al.’s four types of operating models into a few sentences to save time, or eliminate it.

What is current research in enterprise architecture? That’s the only thing I think I would add to this. I don’t see how software development fits into this, and networking and databases would be at too low a level to include.

The Ross et. al. single page enterprise architecture scheme is but one of many frameworks. Some are extremely complicated and incorporate more data and more detail. Turns out that people have been talking about enterprise architecture since at least the late 1980’s. So, me saying “firms have been increasingly interested over the last several years” is way off.

Ongoing research in this area seems to be oriented around evaluating extant frameworks and creating new frameworks; firms all seem to understand that EA is important. The question that researchers have is: how do you make one, at what level of detail should it be, how do you maintain it, and how do you use it to influence decisions.