What is an Enterprise Model ?
In the existing literature, Enterprise Models may
also be called Enterprise Architectures, or Enterprise Frameworks. Use
of these different terms has led to considerable confusion. On this web
site we have used "Enterprise Model" as the preferred terminology. The
term "Architecture" will be reserved for logical or physical
architectures which are the final result of the enterprise design
Enterprise Models are comprised of:
- An overall conceptual framework (usually expressed
- Architectures, which may be physical (hardware) or
Logical (software) and
- Methodologies, which are different at each phase
of the enterprise, and for each organizational group.
|Enterprise Models also include a diagramatic
"framework" for structuring information about the enterprise. The PERA
"Wind chime" is an example of such a diagram.
||Enterprise Methodologies describe the work
processes involved in life cycle "phases" such as Master Planning,
Design, Construction and Operations. This PERA Master Planning flow
diagram is an example of a Methodology used during the Conceptual
|Enterprise Architectures indicate main
functional entities, and how these relate to other items in the
||Software architectures indicate how software
and information flows are structured.
|Hardware Architectures indicate how computer
hardware and networks are structured.
Both hardware and software architectures may exist at
several levels of detail, the highest being the overall Enterprise
here for a list of Enterprise Models and Methodologies
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