Chapter 31. TOGAF ADM Guide-Through

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  4. 5. Phase B – Business Architecture

5. Phase B – Business Architecture

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Phase B is related to the development of a Business Architecture to support an agreed Architecture Vision. The Business Architecture describes the product and/or service strategy, and the organizational, functional, process, information, and geographic aspects of the business environment.

Phase B includes the following EA activities:

  • The fundamental organization of a business, embodied in
    • its business processes and people,
    • their relationships to each other and the environment
    • and the principles governing its design and evolution
  • Shows how the organization meets its business goals


The objectives of Phase B are to:

  • Develop the Target Business Architecture that describes how the enterprise needs to operate to achieve the business goals, and respond to the strategic drivers set out in the Architecture Vision, in a way that addresses the Statement of Architecture Work and stakeholder concerns
  • Identify candidate Architecture Roadmap components based upon gaps between the Baseline and Target Business Architectures


This section defines the inputs to Phase B.

  • Reference Materials External to the Enterprise
  • Non-Architectural Inputs
  • Architectural Inputs


The level of detail addressed in Phase B will depend on the scope and goals of the overall architecture effort. New models characterizing the needs of the business will need to be defined in detail during Phase B. Existing business artifacts to be carried over and supported in the target environment may already have been adequately defined in previous architectural work; but, if not, they too will need to be defined in Phase B.

The steps in Phase B are as follows:

  1. Select Reference Models, Viewpoints, and Tools
  2. Develop Baseline Business Architecture Description
  3. Develop Target Business Architecture Description
  4. Perform Gap Analysis
  5. Define Candidate Roadmap Components
  6. Resolve Impacts Across the Architecture Landscape
  7. Conduct Formal Stakeholder Review
  8. Finalize the Business Architecture
  9. Create the Architecture Definition Document


The outputs of Phase B may include, but are not restricted to:

  • Refined and updated versions of the Architecture Vision phase deliverables, where applicable, including:
  • Draft Architecture Definition Document
  • Draft Architecture Requirements Specification
  • Business Architecture components of an Architecture Roadmap

The outputs may include some or all of the following:

  • Catalogs:
    • Value Stream catalog
    • Business Capabilities catalog
    • Value Stream Stages catalog
    • Organization/Actor catalog
    • Driver/Goal/Objective catalog
    • Role catalog
    • Business Service/Function catalog
    • Location catalog
    • Process/Event/Control/Product catalog
    • Contract/Measure catalog
  • Matrices:
    • Value Stream/Capability matrix
    • Strategy/Capability matrix
    • Capability/Organization matrix
    • Business Interaction matrix
    • Actor/Role matrix
  • Diagrams:
    • Business Model diagram
    • Business Capability Map
    • Value Stream Map
    • Organization Map
    • Business Footprint diagram
    • Business Service/Information diagram
    • Functional Decomposition diagram
    • Product Lifecycle diagram
    • Goal/Objective/Service diagram
    • Business Use-Case diagram
    • Organization Decomposition diagram
    • Process Flow diagram
    • Event diagram