enterprise architecture basics
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if you want to learn Enterprise architecture as easy as possible..... so this is what you want :)TRANSCRIPT
Enterprise Architecture
Mahdi Ameri (8711121026)Mahmoud Dehghan(8711121012)
Introduction
• An enterprise architecture is a rigorous description of the structure of an enterprise, which comprises enterprise components (business entities), the externally visible properties of those components, and the relationships (e.g. behavior) between them.
• EA describes the terminology, the composition of enterprise components, and their relationships with the external environment, and the guiding principles for the requirement (analysis), design, and evolution of an enterprise.
What is Architecture?
Basic Concepts in Enterprise Architecture
Architecture Definitions
• IEEE: “An architecture is the fundamental organization of a system embodied in its components, their relationships to each other, and to the environment, and the principles guiding its design and evolution.”
• TOGAF: “Architecture has two meanings depending upon its contextual usage: (1) A formal description of a system, or a detailed plan of the system at component level to guide its implementation; (2) The structure of components, their interrelationships, and the principles and guidelines governing their design and evolution over time.”
• The Netherlands Architecture Forum(NAF):“a normative restriction of design freedom and operationally as a set of design principles.”
Enterprise Conceptual Model
• Enterprise Aspects• Enterprise layers and views
Enterprise Aspects
• Information: Information is the Memory of organizations. Forms, Reports,
Financial Documents are examples of information.
• Business Processes: A business process or business method is a collection of related, structured activities or tasks that produce a specific service or product (serve a particular goal) for a particular customer or customers. It often can be visualized with a flowchart as a sequence of activities.
• Places: • offices, Warehouses, Factories, Manufacturing units
• People: every organization has specific structure which Organizational position , Management ,…. Defined in it.
• Events• Goals
Enterprise layers and views
• Strategic Layer: refers to a layer which all major decisions of an organisation are taken there.• All topics related to this layer are out of the EA issues and we just use
their documentations as entries the of EA Process.
• Mission Layer: All processes of the organization• It contains: Supreme Management, Intermediate Management and
Operational Management
• ICT Layer: This Layer contains all informational and communicational processes which are used to do mission layer tasks.
Effective Factors in Enterprise Changes
• Changes in business
• Changes in Technology
Changes Driven From New Technologies
Competitors can use new Techs against us
New Techs are cheaper
New Techs are more efficient
Expectations of customers are rising
Supporting old tech is too expensive
Interaction Changes On The Organizational Layers
Impacts resulting from Strategic Layer
Impacts resulting from Mission Layer
Impacts resulting from Information Technology Layer
Enterprise Architecture Definitions
EA is an approach to describe all aspects and layers of an
organization which can describe present Situation and future Situation by presenting some
standards.
EA also contains a plan called “Transition plan” that specifies how
to achieve to the future situation from present Situation .
Enterprise Architecture Benefits
Providing Flexibility For Environmental Changes
Matching Mission & IT Layer Requirements
Reducing The Risk Of The IT project
Providing Effective Control Of The Organization
Enterprise Architecture Applications
Coordinating Between IT & Mission Layer
Organizational Change Management
Replacing hereditary Systems
Planning For Upgrading
Information Systems
The EA Frameworks
• Department of Defense Architecture Framework (DODAF): • Department of Defense released the latest version of it’s framework,
C4ISR, as DODAF.• This Framework is based on three views:• Operating• Systemic• Technical Standards
• Federal Enterprise Architecture Framework (FEAF):• Most of US ministries use this Framework for their Enterprise
Architecture.• It contains three enterprise aspect.
The EA Frameworks (cont.)
• Treasury Enterprise Architecture Framework (TEAF):• The first version, was introduced in 2000.• This Framework is a customized version of FEAF and is used for
financial systems.
• The Open Group Architecture Framework(TOGAF): • The Open Group institute introduced this Framework in 1995.• Is based on older version named TAFIM.• This framework is the oldest framework which is presented by an
independent company.
The EA Frameworks (cont.)
• Zachman Architecture:• Introduced in 1987 by Mr. Zachman.
• In theoretical point of view it is the most complete framework.
• It contains all six aspects and all views related to information system of an organization.
• Principles and Concepts of this framework is affected other frameworks.
• Zifa institute which is established by Zachman is supporting this framework.
The EA Frameworks Comparison
CollectivityCustomizabilityQuality of technical docs
having a successful experience
Having Technical
knowledge
Simplicity of Learning
Technical Support
Tools supporting
The Situation Of Enterprise Architecture
In The World And Iran
The Situation Of Enterprise Architecture In The World
• Active Courtiers • USA• Netherland• United kingdom
• Important Usage of EA:• Coordinating Between IT & Mission Layer.• Organizational Change Management.
Active Companies In EA
• Dow Jones• Toyota Motors• T-Mobile• Verizon• Motorola• …..
Common Frameworks
FEAF Zachman
Note That: TEAF is not used now
Enterprise Architecture In Iran
• Iran was 8th active country on Enterprise Architecture in the world in 2004.
• Iranian active companies:• Ministry of culture.• Ministry of Agriculture.• The Presidential Administration.• Iranian Railways.• Iranian Armed Forces.
