History
Enterprise architecture started with the Zachman Framework in 1987. Another early implementation of an Enterprise architecture framework was the "Technical Architecture Framework for Information Management" (TAFIM). The first draft of TAFIM was completed in 1991 with the TAFIM Technical Reference Model (TAFIM TRM). This technical reference model wanted to use open systems and new technologies available in the commercial market, to develop a DoD-wide application. The TOGAF TRM was originally derived from the Technical Architecture Framework for Information Management (TAFIM), which in turn was derived from the IEEE model 1003.0 or POSIX Open System Environment: a standard "to construct an information processing system, including consumers, system integrators, application developers, system providers, and procurement agencies".
In recent years, it has become apparent that a key benefit to be gained from enterprise architecture is the ability to support decision making in changing businesses. Because enterprise architecture brings together business models (e.g. process models, organizational charts, etc.) and technical models (e.g. systems architectures, data models, state diagrams, etc.) it is possible to trace the impact of organizational change on the systems, and also the business impact of changes to the systems.
As this benefit has emerged, many frameworks such as DoDAF, MODAF, or AGATE have adopted a standard meta model which defines the critical architectural elements and the dependencies between them. Applications based on these models can then query the underlying architectural information, providing a simple and strong mechanism for tracing strategies to organizational and technological impacts.
Read more about this topic: Enterprise Architecture Framework
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