An Enterprise Architecture may describe multiple different states:

1. Baseline Architecture (As-Is)

• Represents the current state of the architecture.
• Documents existing systems, technologies, and business processes.

2. Target Architecture (To-Be)

• Defines the desired future state.
• Aligns with business and IT strategy.

3. Transition Architectures

• Intermediate steps between As-Is and To-Be states.
• Used for phased implementation to manage complexity.

4. Resting Architecture (steady state)

• Major design effort are completed and the organisation is an operational and governance phase
• In iterations, this may precede another iteration of the architecture (phases)
• Value may be delivered to the organisation from this state

5. Candidate Architecture

• A future (Target) state of the architecture that has not been approved by Stakeholders

Architecture Roadmap

• Defines the plan to move from Baseline to Target.
• Includes timelines, dependencies, and implementation priorities.