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Enterprise Architecture (Characteristics of good architecture (resilient,…

- - - - every component
      - external environment
- - - - support growth and change because many systems have long expected life-times
    - - addresses their needs
      - shows how needs with be satsified
      - explains tradeoffs requireed to meet those needs
- - - - building blocks of main system
    - - developed at IBM as IT framework to help clients understand IS projects
      - classifying and organizing the descriptive representations of an enterprise that are significant to management of the enterprises as well as to the development of the enterprises systems
      - borrows from other disciplines
      - Views
        
        provides visualzation infra for specific stakeholders concerns through viewpoint organizaed by various views
        
        artifcats for visualizing, understanding and assimilating the broad scope and complexities or an archiectecture description
    - - Describes 4 views
        
        Business architecture
        
        process the business uses to meet its goals - link strategy formulation to strategy implementation
        
        application architecture
        
        how specific applications are designed and how they interact with each other
        
        data archiecture
        
        enterprise's logical and physical data resources and the data is managed
        
        Technical architecture
        
        the hardware and software infra that supports the business processes, applications, and their interactions
  - - - recommended to use
        
        will comprehensive view of the organization
        
        minimize risk of leaving out importnatn enterprise views
        
        minimize time and cost of creating a architecture
      - doesn't need to be used as is - can mix it up
      - Decide what to include in the EA
        
        choose those that are system-wide m high priority and important ot the business
    - - a good EA provides a flexible, scalablae structure that can be modified over time
      - will guide later projects
    - - identify the gaps between the as-is model and the to-be model andfind out how to close those gaps