- OG0-091 is The Open Group's exam code for the TOGAF 9 Part 1 Examination, not a job title.
- Passing means 24 of 40 questions correct in 60 minutes, closed book, on TOGAF 9.2 content.
- ADM Phases carries 22.5% of the exam - the single largest domain weighting.
- Fee is $375 booking or $400 retail voucher for 2026, with no prerequisites required.
What OG0-091 Actually Means
OG0-091 is simply an exam code - a product identifier used by The Open Group and its testing partner, Pearson VUE, to reference one specific test: the TOGAF 9 Part 1 Examination. When people search for "what does OG0-091 mean," they're usually trying to confirm whether it's a certification, a course, or a job qualification. It's none of those on its own. It's the gateway exam that, once passed, grants the TOGAF 9 Foundation credential.
The "OG" prefix signals The Open Group as the governing body. The numeric portion distinguishes it from related codes, such as OG0-092 (the Part 2, Certified-level exam). If you're comparing the two, our companion piece on OG0-091 Certification lays out exactly how Part 1 and Part 2 relate to each other and to the combined OG0-093 pathway.
For a deeper etymology-style breakdown of the code itself, see What Does OG0-091 Stand For? and OG0-091 Meaning, which unpack the naming convention in more detail than we will here.
The Exam Format Behind the Code
Knowing what OG0-091 "means" also requires knowing what sitting for it actually involves. The exam consists of 40 simple multiple-choice questions delivered in a 60-minute window. There's no case-study scenario section here - that style of question appears on the Part 2 exam instead. OG0-091 questions test direct recall and comprehension of TOGAF 9 terminology, structure, and concepts drawn strictly from the TOGAF 9 Standard, Version 9.2.
The passing threshold is 60%, or 24 out of 40 questions correct. There are no prerequisites - anyone can register and sit the exam without prior coursework, though most candidates complete some form of preparation first. The exam is proctored and closed book, meaning no reference material, notes, or the standard itself can be consulted during the test.
If you're trying to gauge how tough this actually is in practice, our How Hard Is the OG0-091 Exam? Complete Difficulty Guide 2026 walks through the difficulty profile question type by question type, and OG0-091 Pass Rate 2026: What the Data Shows covers what's publicly known about outcomes.
Key Takeaway
With 60 minutes for 40 questions, you have roughly 90 seconds per question - plenty of time if terminology is memorized, tight if you're still reasoning through TOGAF vocabulary during the exam itself.
What the 11 Domains Tell You
The real meaning of OG0-091 is best understood through its content structure. The Open Group organizes the exam into 11 weighted domains, and the weighting tells you exactly where to invest study time:
| 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 roughly 9 of the 40 questions - nearly a quarter of the exam. Combined with ADM Guidelines and Techniques at 15%, more than a third of your score depends on thoroughly understanding the Architecture Development Method cycle: its phases, inputs, outputs, and the techniques used to adapt it.
ADM Phases (22.5%)
Candidates must know each phase of the Architecture Development Method - from the Preliminary Phase through Phases A-H and Requirements Management - including the purpose, key activities, and sequencing of each.
- Objectives and inputs/outputs of every ADM phase
- How Requirements Management interacts with all other phases
- Transition points between phases and iteration cycles
For a full breakdown of all 11 domains with study guidance for each, see OG0-091 Exam Domains 2026: Complete Guide to All 11 Content Areas. We've also published dedicated deep-dives for the earlier domains: OG0-091 Domain 1: Basic Concepts, OG0-091 Domain 2: Core Concepts, OG0-091 Domain 3: Introduction to the ADM, and OG0-091 Domain 4: The Enterprise Continuum and Tools.
Registration, Fees, and Delivery
Part of understanding what OG0-091 means is understanding the logistics of actually taking it. The exam is delivered exclusively through Pearson VUE - either at an authorized test center or remotely via OnVUE online proctoring. For 2026, candidates should budget $375 for the exam booking fee or $400 for a retail exam voucher, depending on how the exam is purchased and through which channel.
There's no eligibility requirement, application review, or professional experience threshold. You register, pay, schedule a slot, and sit the exam - closed book, under supervision, whether in person or remote. This low-barrier structure is part of why OG0-091 functions as an entry point into the TOGAF certification track rather than a capstone credential.
A complete cost breakdown, including how OG0-091 pricing compares across regions and voucher types, is available in OG0-091 Certification Cost 2026: Complete Pricing Breakdown.
Who Earns OG0-091 and Why
OG0-091 is most commonly pursued by enterprise architects, solution architects, business analysts, IT consultants, and project managers working in organizations that have standardized on TOGAF as their architecture framework. Government agencies, large consultancies, financial institutions, and telecom companies frequently list TOGAF 9 Foundation as a preferred or required qualification in job postings for architecture-adjacent roles.
Because there are no prerequisites, it's also a common starting point for professionals transitioning into enterprise architecture from adjacent disciplines like business process management, IT governance, or systems analysis. Passing OG0-091 signals fluency in TOGAF's shared vocabulary - a practical requirement on teams where architects, stakeholders, and governance boards need a common language to describe deliverables, phases, and building blocks.
To see the kinds of roles and postings that reference this credential directly, browse OG0-091 Jobs. If you're weighing whether the investment translates into hiring advantage or compensation impact, OG0-091 Salary Guide 2026: Complete Earnings Analysis covers what's known qualitatively about how the credential factors into architecture career tracks.
What the Credential Is Worth Once Earned
Passing OG0-091 does two things simultaneously: it confers the standalone TOGAF 9 Foundation designation, and it counts as partial credit toward the higher-level TOGAF 9 Certified designation, which also requires passing the Part 2 exam (OG0-092). This two-tier structure is intentional - Foundation validates knowledge of terms and structure, while Certified validates the ability to apply that knowledge to real architecture scenarios.
Some candidates stop at Foundation because their role only requires literacy in TOGAF concepts, not hands-on application. Others use OG0-091 purely as the first half of a combined push toward full certification. Either path is valid, and neither locks you out of the other since Foundation status never expires.
If you're still deciding whether pursuing this credential fits your career goals, Is the OG0-091 Certification Worth It? Complete ROI Analysis 2026 weighs the qualitative trade-offs in more depth. For a broader orientation to the credential before you commit to studying, What Is OG0-091?, What Is A OG0-091?, and What Is OG0-091 Certification? each answer a slightly different framing of the same underlying question.
Turning the Meaning Into a Study Plan
Once you understand what OG0-091 measures, the study plan writes itself around the domain weightings rather than a generic checklist. Given that ADM Phases and ADM Guidelines and Techniques together make up 37.5% of the exam, they deserve the most calendar time, while lighter domains like Building Blocks, ADM Deliverables, and TOGAF Reference Models (5% each) need only enough review to recognize definitions and diagrams.
Foundational Vocabulary
- Basic Concepts and Core Concepts (15% combined)
- Build a glossary of TOGAF-specific terminology used repeatedly across later domains
The ADM Core
- Introduction to the ADM and full ADM Phases walkthrough (30% combined)
- Diagram each phase's inputs and outputs from memory
Techniques and Governance
- ADM Guidelines and Techniques, Architecture Governance, Enterprise Continuum and Tools (35% combined)
- Focus on how techniques adapt the ADM to different engagement types
Lighter Domains and Timed Practice
- Views/Viewpoints, Building Blocks, Deliverables, Reference Models (20% combined)
- Full 40-question timed run-throughs under closed-book conditions
This sequencing mirrors the exam's own weighting rather than treating every domain equally, which is the most efficient way to allocate a limited study window. For a fuller week-by-week methodology with resource recommendations, see OG0-091 Study Guide 2026: How to Pass on Your First Attempt.
Practicing under realistic, timed conditions matters more for this exam than for many others, since 90 seconds per question leaves little room for second-guessing. Running full-length simulations on our practice test platform before exam day is one of the most direct ways to confirm you're both fast enough and accurate enough across all 11 domains. Repeating those simulations on the practice site a few days apart also helps surface which domains still need reinforcement.
Key Takeaway
Don't study all 11 domains equally - allocate roughly proportional time to their exam weight, with ADM Phases and ADM Guidelines and Techniques receiving the largest share of your preparation hours.
Frequently Asked Questions
OG0-091 is the exam code for the TOGAF 9 Part 1 Examination. Passing it earns the TOGAF 9 Foundation certification - the exam and the credential are related but distinct.
The exam has 40 simple multiple-choice questions with a 60-minute time limit, delivered closed book under proctored conditions.
A passing score is 60%, equivalent to answering 24 out of 40 questions correctly.
No. There are no prerequisites for OG0-091 - any candidate can register and schedule the exam directly through Pearson VUE.
ADM Phases carries the heaviest weighting at 22.5% of the exam, roughly 9 of the 40 questions, making it the single most important domain to master.
No. TOGAF 9 Foundation does not expire and has no renewal or continuing-education requirement once earned.