🧠 Architecture Abstraction Levels

What is architectural abstraction used for?

To divide complex architecture problems into smaller, manageable layers across all domains.

What are the four abstraction levels in TOGAF?

Contextual, Conceptual, Logical, Physical

What does the Contextual level answer?

Why is architecture needed? – focuses on goals, drivers, scope, and environment.

What does the Conceptual level answer?

What is needed? – focuses on requirements & desired service Behaviour.

What’s another name for the Conceptual level?

Service Abstraction or Behaviour Abstraction

What does the Logical level answer?

How should the architecture be structured? – focuses on logical design, abstracted from implementation.

What does the Physical level answer?

With what assets is it implemented? – defines physical components, platforms & configurations.

Can a single landscape level include multiple abstraction levels?

Yes — e.g., a Capability Architecture can have both Logical & Physical views.

What’s the key difference between abstraction & landscape levels?

• Abstraction = perspective (why, what, how, with what)

• Landscape = granularity (scope, time, detail)