Computer Science
Green Information and Communications Technology Strategies


Computer Science
Green Information and Communications Technology Strategies

Unit 3: Business/IS Strategy and Planning

Seminar: Enterprise Architecture

This week we will conclude our study of business/IS strategy and planning by looking at enterprise architecture (EA) as one of the strategic tools for business. Green ICT needs to be incorporated into the models and plans used to improve business performance.

The Australian Government Information Management Office, in Australian Government Architecture, defined EA as

The explicit description and documentation of the current and desired relationships among business and management processes and information technology. An EA describes the 'current architecture' and 'target architecture' to include the rules and standards and systems life cycle information to optimise and maintain the environment which the agency wishes to create and maintain by managing its ICT portfolio. The EA must also provide a strategy that will enable the agency to support its current state and also act as the roadmap for transition to its target environment. These transition processes will include an agency's capital planning and investment control processes, agency EA planning processes and agency systems life cycle methodologies.

In his blog Real-world Enterprise Architecture part I: journey vs Destination (May 15, 2007), Neil Ward-Dutton argues that documentation should not focus too much on the technical nature of EA outputs (diagrams and reports), but rather, EA should concentrate on communicating with business people and on engaging stakeholders. In part II (May 15, 2007) Ward-Dutton argues that large organizations are rarely truly centralized and actually use a federated style of IT work.

Methods and Areas of Practice

There are many complex models, but EA is generally divided into four practice areas:

  1. Business:
  2. Applications:
  3. Information:
    • metadata: data that describes enterprise data
    • data models: conceptual, logical, and physical models
  4. Technology:

Enterprise Architecture Example

An example of an EA is the US National Institutes of Health (NIH) Enterprise Architecture site. It includes business process and data models, and technology architecture.

Last modified: Thursday, 12 June 2014, 11:34 PM MDT
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