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Enterprise architecture regards the enterprise as a large and complex system or system of systems. [3] To manage the scale and complexity of this system, an architectural framework provides tools and approaches that help architects abstract from the level of detail at which builders work, to bring enterprise design tasks into focus and produce valuable architecture description documentation.
The Architecture Development Method (ADM) is applied to develop an enterprise architecture which will meet the business and information technology needs of an organization. It may be tailored to the organization's needs and is then employed to manage the execution of architecture planning activities. [18] The process is iterative and cyclic.
Successful enterprise architecture programs are approached from a management perspective as opposed to a modeling perspective. A new generation of EA Planning tools are emerging that support not only the modeling of the architecture, but also the creation of roll-out and implementation plans for continuous IT improvement over time.
The Enterprise Architecture Planning (EAP) methodology is beneficial to understanding the further definition of the Federal Enterprise Architecture Framework at level IV. EAP is a how to approach for creating the top two rows of the Zachman Framework, Planner and Owner. The design of systems begins in the third row, outside the scope of EAP.
The first use of the term "enterprise architecture" is often incorrectly attributed to John Zachman's 1987 A framework for information systems architecture. [12] The first publication to use it was instead a National Institute of Standards (NIST) Special Publication [13] on the challenges of information system integration.
Fig 1. GERAM Framework: This set of components is identified in the first image and briefly described in the following. Starting from defined concepts to be used in enterprise integration (GERA), GERAM distinguishes between the methodologies for enterprise integration (GEEM) and the languages used to describe structure, contents and behaviour of the enterprise (GEML).