What exactly is EA?

If you are searching the web for a description of Enterprise Architecture, chances are you will come across various translations. This is because there is not one set definition for EA. I’ve encountered this handy list of different interpretations of Enterprise Architecture compiled by Roger Pedroso across various sources at the IT Knowledge Exchange. I’m sure you’ll find it just as useful. Here’s the list:

1. Enterprise Architecture is a complete expression of the enterprise; a master plan which “acts as a collaboration force” between aspects of business planning such as goals, visions, strategies and governance principles; aspects of business operations such as business terms, organization structures, processes and data; aspects of automation such as information systems and databases; and the enabling technological infrastructure of the business such as computers, operating systems and networks.

2. An enterprise architecture (EA) is a conceptual blueprint that defines the structure and operation of an organization.

3. The EA is:
What: The structure of an Enterprise and its blueprint describing.
How: How the Enterprise operates and the processes executed by.
Whom: People.
Which: The technology implementing processes.
Where: Showing the location of people and technology.
Why: To streamline, align, blueprint, strategically plan, and confer agility.
When: According to the Enterprise transformation plan to a target state.

4. Enterprise architecture is an agency-wide framework for incorporating business processes, information flows, applications, and infrastructure to support agency goals.

5. Enterprise architecture is the organizing logic for business processes and IT infrastructure.