- OG0-091 is The Open Group's internal code for the TOGAF 9 Part 1 Examination, the Foundation-level test.
- It has 40 multiple-choice questions in 60 minutes, with 24 correct answers (60%) needed to pass.
- ADM Phases is the single largest domain, worth 22.5% (9 of 40 questions).
- The 2026 fee is $375 for a booking or $400 for a retail voucher, with no expiration once passed.
What OG0-091 Actually Means
Search "OG0-091 meaning" and you'll find a mix of vague answers. In plain terms, OG0-091 is the exam code assigned by The Open Group to the TOGAF 9 Part 1 Examination, which is the qualifying test for the TOGAF 9 Foundation certification. It is not a separate credential name - it's the identifier that appears on your exam registration, your score report, and in Pearson VUE's system when you book a seat. If you've seen this code on a study guide or a voucher confirmation email, it refers to this specific, single exam.
For a broader introduction to the credential itself, see What Is OG0-091?. This article focuses specifically on what the code represents, how it's structured, and what it tests - the "meaning" behind the letters and numbers rather than a general overview.
Decoding the Exam Code Structure
The Open Group uses a consistent naming convention across its certification portfolio, and understanding it removes a lot of confusion for first-time candidates.
- OG - stands for "The Open Group," the governing body that owns and maintains the TOGAF standard.
- 0 - part of the internal series numbering used across Open Group certification tracks.
- 091 - the specific exam identifier assigned to the TOGAF 9 Part 1 (Foundation) test, distinguishing it from OG0-092 (TOGAF 9 Part 2, the Certified-level exam).
This naming pattern matters practically: when you register through Pearson VUE, you must select "OG0-091" precisely - not "TOGAF 9 Foundation" as free text - because the system matches vouchers and results to that exact code. Related questions like What Does OG0-091 Stand For? and What Does OG0-091 Mean? dig further into this naming logic if you want additional context.
What OG0-091 Tests You On
Beyond the code itself, "meaning" also refers to what the exam actually measures. OG0-091 is built entirely around the TOGAF 9 Standard, Version 9.2, and it is a closed-book, supervised exam - you cannot bring notes, reference material, or use outside tools during the session. This is a deliberate design choice: the exam confirms that you have internalized terminology and structure, not that you can look things up.
The format itself is simple multiple-choice - no scenario-based case studies, no complex weighted responses like the Part 2 exam. Each of the 40 questions typically has one correct answer among several options. The straightforward format is one reason many candidates ask How Hard Is the OG0-091 Exam? Complete Difficulty Guide 2026 - the difficulty comes less from question complexity and more from the sheer volume of TOGAF-specific vocabulary and structural concepts you must memorize.
Key Takeaway
Because OG0-091 is closed-book and terminology-heavy, memorization of TOGAF-specific definitions (not general enterprise architecture knowledge) is what determines your score.
The 11 Domains Behind the Meaning
To really understand what OG0-091 measures, you need to look at its 11 official domains and their weightings. This structure is spelled out in full in OG0-091 Exam Domains 2026: Complete Guide to All 11 Content Areas, but here's the breakdown that defines the exam's actual meaning in terms of content:
| Domain | Weight |
|---|---|
| Basic Concepts | 7.5% |
| Core Concepts | 7.5% |
| Introduction to the ADM | 7.5% |
| The Enterprise Continuum and Tools | 10% |
| ADM Phases | 22.5% |
| ADM Guidelines and Techniques | 15% |
| Architecture Governance | 10% |
| Architecture Views, Viewpoints, and Stakeholders | 5% |
| Building Blocks | 5% |
| ADM Deliverables | 5% |
| TOGAF Reference Models | 5% |
Notice that ADM Phases alone accounts for 9 of the 40 questions - nearly a quarter of the exam. That single fact should shape your entire preparation strategy: no other domain comes close to that weight, and skipping depth here is the most common reason candidates fall short of the 24-question passing threshold.
ADM Phases (22.5%)
Covers the Architecture Development Method's phases from Preliminary through Requirements Management. Candidates must know the purpose, inputs, and outputs of each phase in sequence.
- Know phase order and what triggers movement between phases
- Understand the role of the Requirements Management phase at the center of the cycle
- Be able to distinguish objectives of similar-sounding phases (e.g., Business Architecture vs. Information Systems Architectures)
ADM Guidelines and Techniques (15%)
The second-heaviest domain, covering the supporting techniques used to apply the ADM in practice.
- Study stakeholder management, gap analysis, and migration planning techniques
- Understand when guidelines apply to iteration versus adapting the ADM for different purposes
For domain-by-domain study material, dedicated guides exist for the earlier foundational domains: Domain 1: Basic Concepts, Domain 2: Core Concepts, Domain 3: Introduction to the ADM, and Domain 4: The Enterprise Continuum and Tools. These smaller domains are individually low-weighted, but combined they represent nearly a third of the exam, so they shouldn't be treated as an afterthought.
Registration, Fees, and Delivery
Part of understanding "OG0-091" is understanding the logistics attached to that code, since these details are specific to this exam and not general test-taking advice.
- Delivery: Pearson VUE authorized test centers or OnVUE online proctored delivery - you choose at booking.
- Fee for 2026: $375 as a direct exam booking fee, or $400 if purchased as a retail voucher through a reseller.
- Format: 40 simple multiple-choice questions, 60 minutes total.
- Passing score: 60%, equivalent to 24 correct answers out of 40.
- Prerequisites: None - anyone can register directly.
- Governing body: The Open Group, which also maintains the TOGAF 9 Standard, Version 9.2 body of knowledge the exam is based on.
A full pricing comparison, including bundled Part 1 + Part 2 options, is available in OG0-091 Certification Cost 2026: Complete Pricing Breakdown. If you're weighing whether the fee is justified by outcomes, Is the OG0-091 Certification Worth It? Complete ROI Analysis 2026 covers that trade-off directly.
What Passing OG0-091 Means for Your Career
The credential you earn by passing OG0-091 is called TOGAF 9 Foundation. It's worth being precise about what that does and doesn't mean:
- It confirms foundational knowledge of TOGAF terminology, structure, and the ADM - not hands-on architecture delivery experience.
- It provides partial credit toward the combined TOGAF 9 Certified designation, which also requires passing OG0-092 (Part 2).
- It is commonly listed as a baseline or preferred qualification in job postings for enterprise architecture, business analysis, and IT strategy roles - see OG0-091 Jobs for the kinds of roles that reference this credential.
Employers who hire for architecture governance boards, IT transformation programs, and consulting practices frequently list TOGAF Foundation as a baseline screening credential, precisely because it signals shared vocabulary across a team - everyone who has passed OG0-091 understands the same definitions for terms like "Architecture Building Block" or "Transition Architecture," reducing miscommunication in project documentation. For a deeper look at how this translates into compensation, OG0-091 Salary Guide 2026: Complete Earnings Analysis breaks down the qualitative career impact without invented figures.
If you want a plain overview of the certification path itself, OG0-091 Certification and What Is OG0-091 Certification? both cover the certification structure from a different angle than this article.
Turning Meaning Into a Study Plan
Once you understand what OG0-091 measures - heavy weight on ADM Phases and ADM Guidelines and Techniques, lighter but still-tested weight on Reference Models, Building Blocks, and Governance - you can build a study sequence that mirrors the exam's actual priorities rather than studying every domain equally.
Foundational Vocabulary
- Basic Concepts and Core Concepts domains (15% combined)
- Build a glossary of TOGAF-specific terms before moving forward
The ADM Core
- Introduction to the ADM plus deep review of ADM Phases (30% combined)
- Memorize phase order, objectives, inputs, and outputs
Techniques and Governance
- ADM Guidelines and Techniques, Architecture Governance, Enterprise Continuum and Tools (35% combined)
- Practice distinguishing similar techniques and governance checkpoints
Remaining Domains and Full Review
- Views/Viewpoints, Building Blocks, ADM Deliverables, Reference Models (20% combined)
- Full-length timed practice runs under 60-minute conditions
This sequencing isn't a generic four-week template - it's ordered specifically by OG0-091's domain weights, front-loading the ADM material because it dominates the scoring. For a more detailed week-by-week plan with specific resources, see OG0-091 Study Guide 2026: How to Pass on Your First Attempt. And since the format is 40 questions in 60 minutes with no case studies, timed practice on our practice test platform is one of the most direct ways to simulate real exam pacing before test day.
Key Takeaway
Study in proportion to domain weight: ADM Phases and ADM Guidelines and Techniques together make up 37.5% of the exam - more than a third of your score.
Frequently Asked Questions
OG0-091 is The Open Group's exam code for the TOGAF 9 Part 1 Examination, the test required for TOGAF 9 Foundation certification. It has no separate meaning beyond identifying this specific exam in Pearson VUE's system.
OG0-091 is the exam; TOGAF 9 Foundation is the credential you receive after passing it. The two terms are often used interchangeably, but technically one is the test and the other is the outcome.
The exam has 40 simple multiple-choice questions to complete in 60 minutes, with a passing score of 60%, or 24 correct answers.
No. TOGAF 9 Foundation status, earned by passing OG0-091, does not expire and has no renewal or continuing education requirement.
ADM Phases is the largest domain at 22.5% of the exam (9 of 40 questions), followed by ADM Guidelines and Techniques at 15%. These two domains combined make up more than a third of your score.