What is Enterprise Architecture (EA)?

Date: 02/12/2019| Category: IT Governance & Service Management|

Enterprise Architecture (EA) is the analysis of the overall structure of an organization, which describes its components, namely:

  • operational processes
  • information systems and flows
  • methodologies and technologies used
  • principles and guidelines
  • other key information (e.g. objectives and location).

Using the words of The Open Group “The architecture of the enterprise allows us to determine the elements that make up the enterprise and how they are related to each other”.

The enterprise architecture provides a static picture of the company, to be able to understand it better, but also a dynamic vision, “a map” which shows the state of departure and the state of arrival and which serves to put into practice the strategies and the objectives of the enterprise in a determined temporal arc. This map, made up of requirements, guiding principles and models, serves to define how the various components of the company will evolve to reach the desired state and represents the company in its entirety.

The enterprise architecture can be defined like a holistic approach that considers all the facets that compose the enterprise, from the business to the technological aspects. Within the EA there are four different types of architecture:

  • Business Architecture: starting from the strengths of the company, tries to trace new processes and structures that are more in line with the objectives and the research of innovation;
  • Information Architecture: aims to improve the quantity and quality of information available to the organization;
  • Applications Architecture: describes the applications used in the company, their relationships and interactions with business processes and users;
  • Technology Architecture: describes the infrastructure and includes all infrastructure services, technological components (such as servers, networks, middleware and user support tools).

History and advantages of the Enterprise Architecture: why is it increasingly important?

The concept of Enterprise Architecture is quite young: it was born in the second half of the ’80s, with the publication of the article “Framework for Information Systems Architecture” by John A. Zachman on the IBM Systems Journal. Zachman later stated that he would like to change his name to “Framework for Enterprise Architecture”, because the framework actually has nothing to do with information systems. 

The article has the merit of introducing the fundamental concepts for enterprise architecture and takes into account two issues: the complexity of business systems and the difficulty of alignment with business. Those two aspects become in the years more and more important and they can’t be ignored anymore.

IT systems are becoming increasingly complex and it is becoming increasingly difficult to keep these systems in line with business needs.

Thanks to the knowledge of an organization’s architecture, it is possible to  fill the gap between strategy and implementation, control operational risks and ensure the quality of processes and data.

The architecture helps to:

  • create a shared corporate vision
  • align IT and business
  • control the costs
  • prepare the company for change
  • promote the agility inside the company
  • avoid duplication of technology
  • unlock the information flow
  • ensure compliance with regulations
  • integrate the business processes

Nowadays many organizations still do not fully understand the importance of an architecture for their company. Many companies focus on building and operating the system, without designing the organization as a whole and having a holistic vision. Enterprise architecture operates strategically and modern organisations have the opportunity to use it as a support to the transformation of their business. Enterprise Architecture can be a strategic element for the management of the complexity of corporate architectures and their continuous transformation.


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