An architecture—the parts of something and how the parts fit together—needs many views to bring out the details. Take a building’s architecture, for instance. You have the artist’s rendition of the building, maybe a 3-D model, the engineering drawings: the plan view, the elevation view, and the other diagrams such as plumbing, electrical, data network, and so on. The same concept of multiple views applies to an enterprise architecture (EA). The following figure shows the four basic components of an EA: business, data, application, and technical architectures.
The EA for a specific business undertaking includes: (1) the business activities and information flows, (2) data that the activities create and use, (3) the structure of the applications that support the business activities, and (4) the technical infrastructure (networks, systems) that provides the platforms on which the applications run. Regardless of the framework used to document an EA, it has the four basic views that you can also refer to as architectures—business architecture, information (or data) architecture, application architecture, and technical architecture. I think it’s best to think of an EA in terms of these four basic component architectures without regard to the actual tool or framework you use to analyze and document the EA. That way you can avoid getting caught up in terminology of a framework and keep your thinking grounded in reality. Next, you have to focus on documenting the business activities and the information flows in the business area within the scope of the EA.
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