Levels of Architecture Landscape

Why are architecture levels used in TOGAF?

To manage multiple coexisting architectures at different scopes & detail across the enterprise

What are the three architecture levels?

Strategic Architecture, Segment Architecture, Capability Architecture

What is the purpose of Strategic Architecture?

Set direction at executive level across the entire enterprise with long-term scope

What is the scope and detail of Strategic Architecture?

Enterprise-wide breadth, low detail, long time horizon

What is Segment Architecture used for?

Direction setting & roadmap development at the program/portfolio level

What is the scope and detail of Segment Architecture?

Medium breadth, medium detail, medium time horizon

What is Capability Architecture?

Detailed architecture for a narrow scope (e.g., one process or department) with short-term focus

What does Capability Architecture support?

Change frameworks & delivery of capability increments

How do these levels interrelate?

• Segment architectures detail strategic architecture

• Capability architectures detail segment architecture

• Together, they describe the enterprise at increasing levels of detail