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An Introduction to Enterprise Architecture

Iakov Fedoseenko

London Metropolitan University

16th February 2017

Agenda

Outline

• Where did Enterprise Architecture come from?

• What is Enterprise Architecture?

• Why it is important?

• How to develop Enterprise Architecture?

An Introduction to Enterprise Architecture

IBM Systems Journal, 1987

“A framework for information systems architecture”:

“With increasing size and complexity of the implementations of information

systems, it is necessary to use some logical construct (or architecture) for

defining and controlling the interfaces and the integration of all of the

components of the system.”

“The cost involved and the success of the business depending increasingly on its

information systems require a disciplined approach to the management of those

systems.”

History

An Introduction to Enterprise Architecture

John A. Zachman

SOURCE: Zachman International https://www.zachman.com/

Definition

An Introduction to Enterprise Architecture

What is EA?

Enterprise architecture (EA) is

“a conceptual blueprint that

defines the structure and

operation of an organization.”

SOURCE: Techtarget http://searchcio.techtarget.com/definition/enterprise-architecture

Value

An Introduction to Enterprise Architecture

Why it is important?

EA was as a response to two main

concerns:

Growing complexity of IT

(increased cost of

building IT systems)

Growing dependency of

business success on IT

(IT systems do not

support business needs)

EA helps to:

Move from Fragmented

Processes to Integrated

Environment

(IT is responsive to change

and support business

strategy)

Ensure Business Success

(effective management and

exploitation of IT is key for

business execution)

Originally (Reactive) Today (Proactive)

SOURCE: Zachman International https://www.zachman.com/

SOURCE: XKCD https://xkcd.com/927/

Frameworks

An Introduction to Enterprise Architecture

How standards proliferate:

An Introduction to Enterprise Architecture

SOURCE: Zachman International https://www.zachman.com/

The Zachman Framework

TOGAF 9 divides an enterprise

architecture into four domains…

… and describes a process for developing

and managing the lifecycle of an EA

SOURCE: The Open Group http://pubs.opengroup.org/architecture/togaf9-doc/arch/index.html

The Open Group Architecture Framework (TOGAF)

An Introduction to Enterprise Architecture

The Open Group is a global consortium (450+)

SOURCE: The Open Group http://www.opengroup.org/open-group-publications

ArchiMate

An Introduction to Enterprise Architecture

ArchiSurance Example

Alternative Frameworks

An Introduction to Enterprise Architecture

The Zachman Framework for Enterprise Architectures

The Open Group Architecture Framework (TOGAF)

ArchiMate (modelling language)

The Federal Enterprise Architecture

The US Department of Defense Architecture Framework (DODAF)

• The British Ministry of Defence Architecture Framework (MODAF)

• The Rail Architecture frameworK (TRAK)

• The Canadian Department of National Defense Architecture Framework (DNDAF)

• The NATO Architecture Framework (NAF)

• others

BAD NEWS

Difficult to choose one

single framework

GOOD NEWS

Methodologies can

complement each other

Frameworks

An Introduction to Enterprise Architecture

Methodologies are quite different from each other, both in

goals and in approach

Summary

An Introduction to Enterprise Architecture

Blueprint of an organisation

Different frameworks can be used as a toolkit

Started in 1987 (John A. Zachman)

Adds value to the business by:

• Providing structured approach to IT

• Reducing system complexity

• Aligning IT with business strategy

• Making enterprises responsive to change

Where to find more?

An Introduction to Enterprise Architecture

BizzDesign Blog

ArchiMate® 3.0 -

Strategy

Concepts and

Capability-Based

Planning

http://blog.bizzdesign.com/archima

te-3-strategy-concepts-and-

capability-based-planning

https://hbr.org/product/enterp

rise-architecture-as-strategy-

creating-a-fou/an/8398-HBK-

ENG

https://www.youtube.com/watch?v

=qDI2oF1bASk&t=1s

~5 min ~1 hour ~5 hours

Any questions?

An Introduction to Enterprise Architecture

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