July 20, 2024

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Phase D : Technology Architecture – TOGAF

The Technology Architecture (Phase D)

This step of ADM looks at the technology architecture and is the last pillar of the BDAT architectures (Business, Data, Application & Technology).

The technology architecture looks at the underlying and enabler of the architecture if comprises of data centers, servers, networks, cloud architecture …etc.


The inputs of this phase are:

  1. External reference materials.
  2. Product information and candidate products.
  3. Request for Architecture Work (optional) (Prelim Phase).
  4. Capability assessment (Phase A).
  5. Communication plan (Phase A).
  6. Organization Model for Enterprise Architecture (Prelim Phase).
  7. Tailored Architecture Framework (Prelim Phase).
  8. Technology principles (TOGAF specification Chapter 20).
  9. Approved Statement of Architecture Work (Phase A).
  10. Architecture vision (Phase A).
  11. Architecture Repository
  12. Draft architecture documents and draft requirements (Phase B & C).
  13. Business, data, and application components of an architecture roadmap (Phase B & C).


The steps included in this phase are:

  1. Select reference models, viewpoints, and tools.
  2. Develop a baseline technology architecture description.
  3. Develop target technology architecture description.
  4. Perform a gap analysis.
  5. Define candidate roadmap components.
  6. Resolve impacts across the architecture landscape.


At the end of this phase, the following outputs are generated:

  1. Refined Phase A Deliverables.
  2. Draft architecture definition document
    1. Baseline technology architecture v1.0 (detailed)
    2. Target technology architecture v1.0 (detailed)
  3. Draft architecture requirements specification – Gap Analysis.
  4. Technology architecture components of an architecture roadmap.