OGEA-103 Exam Dumps : TOGAF Enterprise Architecture Combined Part 1 and Part 2 Exam

The Preliminary Phase is the phase in TOGAF where an organization establishes or enhances its Enterprise Architecture Capability. This includes defining governance structures, roles, responsibilities, processes, tools, and architectural principles. The objective is to prepare the organization to successfully execute the ADM.

Phase A focuses on Architecture Vision for a specific initiative, not on creating the overall EA capability. Phase G deals with implementation governance, and Phase H focuses on architecture change management. None of these phases are responsible for establishing the EA practice itself.

The Preliminary Phase answers foundational questions such as how architecture will be governed, who owns architecture decisions, how compliance will be enforced, and how architecture work will be integrated with other organizational processes. Therefore, creation of an Enterprise Architecture Capability clearly belongs to the Preliminary Phase.

Comprehensive and Detailed In-Depth Explanation from Expert in Enterprise Architecture, guiding in TOGAF and ArchiMate:

In the TOGAF Architecture Development Method (ADM), the Preliminary Phase is a foundational phase whose primary purpose is to establish and prepare the Architecture Capability within the enterprise. This phase ensures that the organization is structurally, procedurally, and culturally ready to undertake architecture work in a consistent and governed manner.

A core outcome of this phase is the Organization Model for Enterprise Architecture, which defines:

Architecture roles and responsibilities (e.g., Chief Architect, Domain Architects)

Reporting and decision-making structures

Architecture governance bodies (such as Architecture Boards)

Interaction with other governance and management processes

Accountability and ownership for architecture activities

The Organization Model enables repeatable, controlled, and effective execution of the ADM across initiatives. Without this model, architecture work would lack authority, consistency, and governance alignment.

Why Option A is correct:

The Preliminary Phase explicitly focuses on defining and establishing the Organizational Model for Enterprise Architecture as part of building the enterprise’s Architecture Capability.

Why the other options are incorrect:

B. Architecture Roadmap: This is developed later in the ADM when solution options, work packages, and migration paths are defined, mainly in Phases E (Opportunities & Solutions) and F (Migration Planning).

C. Implementation Governance Model: This is primarily addressed in Phase G (Implementation Governance), where architecture compliance and realization are governed.

D. Architecture Vision for the project: The Architecture Vision is the main deliverable of Phase A (Architecture Vision), which follows the Preliminary Phase.

Authoritative References (TOGAF Standard):

TOGAF ADM – Preliminary Phase: Objectives and Key Activities

TOGAF Architecture Capability Framework

TOGAF Architecture Governance concepts

These sources clearly state that the Preliminary Phase exists to define and establish the Organizational Model for Enterprise Architecture, making Option A the correct and fully aligned answer.

At this stage in the scenario:

A strategic architecture has been completed.

All divisions have completed their Architecture Definition Documents.

Work packages have been defined.

Transition Architectures between Baseline and Target are already identified.

A draft roadmap exists for a multi-year phased migration.

You are now asked to plan the next steps for the migration, which aligns exactly with TOGAF ADM Phase F: Implementation and Migration Planning.

In Phase F, TOGAF prescribes the following key activities:

Evaluate and prioritize projects and work packages

Determine business value, cost, risk, dependencies

Confirm Transition Architectures and sequencing

Update and finalize the Implementation & Migration Plan

Option B is the ONLY answer that correctly follows these required TOGAF steps.

✔ Why Option B is correct

Option B states:

“Estimate the business value for each project by applying the Business Value Assessment Technique … to prioritize the migration projects.”✔ This is a TOGAF-recommended technique specifically for Phase F to evaluate and prioritize transformations using value, risk, and ROI.

“Confirm and plan a series of Transition Architecture phases … using a table of Architecture Definition Increments.”✔ Exactly aligned with TOGAF:

Transition Architectures were identified earlier.

In Phase F, they must be confirmed, sequenced, and documented.

“Update the Implementation and Migration Plan.”✔ This is the required output of ADM Phase F.✔ At this point, the plan must be validated and finalized based on value and prioritization.

Thus, Option B directly matches TOGAF’s prescribed migration planning process.

✘ Why the other options are incorrect

A – Incorrect

Suggests finalizing Architecture Definition documentation—this was already completed by each division.

Introduces an “Implementation Governance Model,” which is not a TOGAF artifact at this stage.

Focuses on lessons learned BEFORE execution, which is not appropriate for migration planning.

C – Incorrect

Focuses only on project selection and resource assignment.

Does not use TOGAF techniques for value/risk evaluation.

Does not reference Transition Architectures, which are central in the scenario.

Oversimplifies Implementation & Migration Planning to resource scheduling.

D – Incorrect

Compliance Assessments occur DURING execution, not before migration planning.

At this stage, no implementation has started, so compliance reviews are premature.

Adjusting performance requirements now has no alignment with TOGAF’s ADM sequence.