Enterprise Architecture Framework – Part 1

Santosh Gaikwad

Santosh Gaikwad

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TOGAF is widely used Framework for Enterprise Architecture, TOGAF certification is considered to be one of the most difficult certifications in Enterprise Architecture.

To understand TOGAF first we need to understand what Enterprise Architecture is, its evolution and other frameworks.

Let’s go step by step and understand Enterprise first.

What is Enterprise?

As per TOGAF, enterprise is a collection of organizations that has a common set of goals.

It is an organizational entity involved in the provision of goods and services to consumers, It can be a department, business unit , regional entity, global organisation, and could also includes customers and partners.

You can treat government agencies, public and private organizations and its business units as enterprise provided they have common set of goals.

What is Enterprise architecture (EA)?

In 1990, the term Enterprise Architecture was formally defined as an architecture that defines and interrelates data, hardware, software, and communications resources, as well as the supporting organization required to maintain the overall physical structure required by the architecture.

Enterprise Architecture is a well-defined practice for conducting enterprise analysis, design, planning, and implementation, using a comprehensive approach, for the successful development and execution of strategy.

Enterprise architecture applies some principles and practices, to guide organizations through the business, information, process, and technology changes necessary to execute their strategies.

These practices make use of  different aspects of an enterprise to identify and achieve changes.

Who are Enterprise Architects?

Enterprise Architects are practitioners of enterprise architecture.

Enterprise architects work with different stakeholders, to build a holistic view of the organization’s strategy, processes, information, and information technology assets.

Enterprise Architect ensures that the business and IT are in alignment, he links the business mission, strategy, and processes of an organization to its IT strategy, and documents this using multiple architectural models or views that show how the current and future needs of an organization will be met in an efficient, sustainable, agile, and adaptable manner.

Evolution of Enterprise Architecture

Enterprise architecture has evolved over a period of time, since it was first introduced by John Zachman, following table depicts the evolution of EA.

 

198219861989
John Zachman mentioned Enterprise Architecture in the public domain first time, when he was working for IBM.

 

The PRISM architecture framework was developed by IBM and some other companiesThe National Institute of Standards and Technology (NIST) published the NIST Enterprise Architecture Model, in 1990s U.S. government promoted this framework in government agencies. 
199219931994
John Zachman introduced a framework for information systems architecture (ISA)

 

Stephen Spewak’s book Enterprise Architecture Planning (EAP) defined a process for defining architectures for the use of information in support of the business and the plan for implementing those architectures. The Open Group selected Technical Architecture Framework for Information Management (TAFIM) from the US Department of Defense (DoD) as a basis for development of The Open Group Architecture Framework (TOGAF)
199719982001
Zachman renamed and refocused his ISA framework as an EA frameworkThe Federal CIO Council began developing the Federal Enterprise Architecture Framework (FEAF).The US Chief CIO council published A practical guide to Federal Enterprise Architecture
2002-200320112013
In its Enterprise Edition, TOGAF 8 shifted focus from the technology architecture layer to the higher business, data and application layers.The TOGAF 9.1. specification says, “Business planning at the strategy level provides the initial direction to enterprise architecture.TOGAF is the most popular Architecture framework (judged by published certification numbers) that some assume it defines EA

 

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