majiayu000 TOGAF Guidance
When to Use This Skill
Use this skill when you need to:
- Understand which TOGAF ADM phase applies to your current work
- Get phase-specific activities and deliverables
- Learn about TOGAF methodology in practical terms
- Apply enterprise architecture governance
Keywords: togaf, adm, architecture development method, phase, business architecture, technology architecture, migration planning, implementation governance, architecture vision
TOGAF 10 Overview
TOGAF (The Open Group Architecture Framework) provides a comprehensive methodology for developing enterprise architecture. The core is the Architecture Development Method (ADM) - an iterative cycle of 10 phases.
The Four Architecture Domains
| Domain | Focus | Artifacts |
|---|---|---|
| Business | Processes, capabilities, organization | Business process models, capability maps |
| Data | Information assets, data management | Data models, data flow diagrams |
| Application | Applications and their interactions | Application portfolio, integration diagrams |
| Technology | Infrastructure and platforms | Technology standards, deployment diagrams |
ADM Phases
Preliminary Phase
Purpose
Establish the architecture capability within the organization.
Key Activities
- Define architecture principles
- Establish governance framework
- Select tools and methods
- Define scope of architecture work
Deliverables
- Architecture principles catalog
- Organization model for EA
- Tailored architecture framework
When you're here
Starting a new EA initiative or formalizing existing practices.
Phase A: Architecture Vision
Purpose
Create a high-level vision aligned with strategic goals.
Key Activities
- Identify stakeholders and concerns
- Define architecture scope
- Create high-level vision
- Obtain approval to proceed
Deliverables
- Architecture vision document
- Stakeholder map
- Statement of architecture work
When you're here
Beginning a new architecture project or major initiative.
Phase B: Business Architecture
Purpose
Develop the business architecture to support the vision.
Key Activities
- Model current business processes
- Define target business capabilities
- Identify gaps and opportunities
- Align with business strategy
Deliverables
- Business architecture document
- Process models
- Capability assessment
When you're here
Understanding business needs before technical solutions.
Phase C: Information Systems Architecture
Purpose
Define data and application architectures.
Sub-phases
- Data Architecture: Information assets, data models, data governance
- Application Architecture: Application portfolio, integrations, APIs
Key Activities
- Model current and target data architecture
- Define application components and interactions
- Identify data-related gaps
Deliverables
- Data architecture document
- Application architecture document
- Integration specifications
When you're here
Designing the systems that support business capabilities.
Phase D: Technology Architecture
Purpose
Define the technology infrastructure.
Key Activities
- Define technology standards
- Model infrastructure components
- Plan platform capabilities
- Address non-functional requirements
Deliverables
- Technology architecture document
- Infrastructure diagrams
- Technology standards catalog
When you're here
Selecting platforms, infrastructure, and technology standards.
Phase E: Opportunities & Solutions
Purpose
Identify implementation approaches and projects.
Key Activities
- Consolidate gaps from B, C, D
- Group into work packages
- Evaluate build vs buy vs reuse
- Identify transition architectures
Deliverables
- Implementation factor assessment
- Work package definitions
- Transition architecture descriptions
When you're here
Planning how to get from current to target state.
Phase F: Migration Planning
Purpose
Create detailed implementation roadmap.
Key Activities
- Prioritize projects
- Estimate resources and timelines
- Define migration approach
- Create implementation roadmap
Deliverables
- Implementation and migration plan
- Architecture roadmap
- Transition architecture details
When you're here
Creating the execution plan with timelines and dependencies.
Phase G: Implementation Governance
Purpose
Oversee architecture implementation.
Key Activities
- Provide architecture oversight
- Conduct architecture compliance reviews
- Handle change requests
- Ensure implementation matches design
Deliverables
- Architecture compliance assessments
- Change requests
- Implementation guidance
When you're here
Projects are executing; ensuring they follow the architecture.
Phase H: Architecture Change Management
Purpose
Manage changes to the architecture over time.
Key Activities
- Monitor technology changes
- Assess business changes
- Determine if new ADM cycle needed
- Maintain architecture relevance
Deliverables
- Architecture change requests
- Updated architecture documentation
- Recommendations for new cycles
When you're here
Maintaining and evolving the established architecture.
Requirements Management
Purpose
Manage architecture requirements throughout all phases.
Note: This is a cross-cutting activity, not a sequential phase. Requirements management operates continuously across all ADM phases.
Key Activities
- Identify requirements
- Baseline requirements
- Monitor baseline
- Handle requirement changes
Deliverables
- Requirements repository
- Impact assessments
- Requirement changes log
Phase Identification Guide
Not sure which phase you're in? Ask these questions:
- Are you starting fresh with EA? → Preliminary Phase
- Defining scope and getting buy-in? → Phase A
- Understanding business needs? → Phase B
- Designing systems and data? → Phase C
- Selecting technologies? → Phase D
- Identifying projects? → Phase E
- Planning implementation? → Phase F
- Overseeing execution? → Phase G
- Maintaining/evolving? → Phase H
Practical Application
For Small Projects
You don't need all phases for every project. A minimal cycle:
- Vision (A): What are we trying to achieve?
- Solution (C/D): What's the technical approach?
- Plan (F): How do we get there?
- Execute (G): Build it right
For Large Initiatives
Follow the full cycle with appropriate rigor:
- Formal stakeholder management
- Complete documentation
- Governance checkpoints
- Architecture review boards
Memory References
For detailed phase information, see references/togaf-overview.md.
Version History
- v1.0.0 (2025-12-05): Initial release
- Complete ADM phase documentation (Preliminary through H)
- Requirements Management (cross-cutting)
- Phase identification guide
- Practical application for small and large projects
Last Updated
Date: 2025-12-05 Model: claude-opus-4-5-20251101