Foreword. By John A. Zachman. I am delighted that Scott Bernard has written this book, “An Introduction to Enterprise. Architecture.” We need. PDF | The discipline of enterprise architecture (EA) seeks to generate alignment between an organization's electronic information systems. Chapter Five: An Introduction to Enterprise Architecture • I. Introduction ing+Papers+February++/cesifo_wppdf. Accessed January 25,
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Introduction. • A Quick Primer. • Products of Enterprise Architecture. ▫ The Role. • Q&A. Agenda protection/reform/files/terney.info). Download An Introduction To Enterprise Architecture: Third Edition PDF books; 2. Book Details Author: Scott A. Bernard Pages: Binding. Introduction. The practise of enterprise architecture (EA) is about informing the business decision making process by understanding how complex organizations .
The focus in this approach is in planning the enterprise architecture at a level high enough to cover the interfaces between an organisation and the players in ecosystems and, at the same time, plan business capabilities supported by data and platforms. Business ecosystems architecture defines how the company integrates to various ecosystems, such as customer and partner ecosystems. The company itself is formed by a corporate ecosystem with dependencies in between the business units.
It also incorporates a business support ecosystem that consists of all vendors and partners related to business support i. HR, finance, IT, legal. The vendor ecosystem could encompass business subcontractors, component suppliers, service suppliers, etc.
The partner ecosystem also defines the dependencies between business partners who, in turn, have a peer role towards the customers. Enterprise architecture governance Enterprise architecture requires a clear governance and an active role in projects to facilitate architecture related decisions.
The goal is to help the company to reach its vision and the desired architecture target state.
It also defines how enterprise architecture content is continuously and systematically updated, published and communicated. Continual updating is necessary to ensure the alignment with the changing strategy and market situation, and to meet the requirements of the varying solution and service landscape.
Enterprise architecture related decisions in projects are done in cooperation between the business capability leads i.
Enterprise architecture needs to be reviewed in different phases of the project as defined by the project model. Projects cause changes in the architectural landscape and thus projects need to give input to enterprise architecture to make sure it reflects the on-going business changes. The aim is to keep enterprise architecture holistic, up-to-date and related to the development of business concepts, processes and solutions.
A good enterprise architecture practice is to proactively give input to concepts and projects before making too many decisions.
Under these circumstances, the concept of Enterprise Architecture EA began to emerge. During the last three decades, there have been excellent attempts to establish different architectural frameworks to control enterprise effort.
Some of them were built from scratch and some were adopted or improved based on the existed frameworks.
This article began with the well Known definition of enterprise architecture.
It was followed by identifying the enterprise architecture components. Moreover, it comprehensively reviewed the history of Enterprise Architecture Frameworks EAFs and briefly illustrated several of them. It ended up with the presentation of enterprise architecture layers proposed 1 and comparing several EAFs against these layers. John Zachman: Generally, architecture is defined by a set of descriptive arguments that are related and intended to develop a new enterprise which contains the basic things in order to make changes after creation of an enterprise architecture 2.
The Open Group: Enterprise architecture is mainly to understand all the different elements making up the enterprise and their inter-relationship 3. OMB The Office of Management and Budget, US : Enterprise architecture means a strategic information asset base, which defines the mission, the information and technology necessary to perform the mission and the transitional processes for implementing new technologies in response to changing mission needs. It also includes a baseline architecture, a target architecture and a sequencing plan 4.
Gartner: Enterprise Architecture EA is basically an area, where some forces are identified and used to make changes to achieve the desired business goals and its outputs.
In general, EA provides the business community and the IT leaders with some ready to use recommendations for changing policies and modifying projects to achieve the projected targets in business. Basically, EA is used a step forward to help decision makers for formulating future state architecture 5. Enterprise Architecture Component EAC : Since, enterprise architecture field is too wide and deals with the enterprise as a whole including several sub architectures or layers, therefore the need for governing, controlling and coordinating the effort for integration between these layers is essential.
Some researchers stated that there are frameworks, methodology, standards and tool sets that were created to serve this purpose 6. Architecture framework: It is important to understand the meaning of architecture and framework separately before illustrating the combined definitions of Architecture Framework AF.
Architecture consists of structural components and their interrelationship, rules and guidelines that describe the design and its creation with time 3. On the other hand, OMB described it as a unified approach to organize and suggest improvement in planning, documentation of activities, design and analysis of an architecture 4.
The framework is composed of different components such as process and contents to be used as a tool to formulate thinking, ensure consistency and completion 3.
It is also described as a structure where information is organized to determine the scope of architecture and inter-relationship of architecture disciplines 4. After knowing the meaning of both words i. An architecture framework is basically an approach to describe in detail the architecture 6.
But oftenly, the term framework is used or misused to indicate the overall approach to architecture. For example, in TOGAF, the framework includes methods, maturity models and other supporting information.
Architecture methodologies: Methodology is a series of steps which are repeatable and can address a particular type of problem that typically centres on a defined process but may also include definition of content 3.
It is defined also as a sequence of techniques for developing an architecture 6. Architecture toolsets: There are many tools that can be used within an enterprise that respond to the business need.
As a result, selecting a tool should be based on clear criteria to identify the best fit tool for the organisation. The open group architecture framework has a useful overview on this matter which can assist in selection 6 , 7. Architecture standards: Currently, there are several standards that describe EA and specify some of its components.
The main purpose was to define a reference model to integrate a wide range of future Open Distributed Processing ODP standards for distribution systems in order to maintain consistency among them. The reference model RM-ODP provided the coordination framework for ODP standards, created an infrastructure within which support of distribution, interworking and portability can be integrated 9.
The JTA identifies a common set of mandatory information technology standards and guidelines for use in all new and upgraded C4I acquisitions across DoD. The JTA standards are used for sending and receiving information information transfer standards such as internet protocol suite , understanding the information information content and format standards such as data elements or image interpretation standards and for processing that information.
The JTA also includes a common human-computer interface and "Rules" for protecting the information i.