OG0-091 Certification

What the OG0-091 Certification Actually Tests

OG0-091 is the official code for the TOGAF 9 Part 1 Examination, administered by The Open Group to award the TOGAF 9 Foundation credential. It is not a general "enterprise architecture" quiz - it is a tightly scoped, terminology-heavy exam built entirely around the TOGAF 9 Standard, Version 9.2. If you've searched for what OG0-091 is or the meaning behind the OG0-091 code, the short answer is: it's the entry-level, closed-book knowledge check that proves you understand TOGAF's vocabulary, structure, and the Architecture Development Method (ADM) well enough to work on or alongside an architecture team.

Unlike experience-based certifications, OG0-091 has no prerequisites. Anyone can register and sit the exam directly. That accessibility is exactly why the exam leans so heavily on precise recall of definitions and structure rather than scenario judgment - which also means generic exam-prep advice does not transfer well here. Candidates who treat this like a typical certification and skim a study guide the night before tend to underestimate how specific the terminology questions get.

Registration, Delivery, and Fee Mechanics

OG0-091 is delivered through Pearson VUE, either at an authorized test center or remotely via OnVUE online proctoring. For 2026, candidates pay either a $375 exam booking fee or a $400 retail voucher fee, depending on how the seat is purchased. Because pricing structures shift and vouchers are sometimes bundled with training, it's worth reviewing the full OG0-091 certification cost breakdown before you commit to a purchase path.

• Format: 40 simple multiple-choice questions
• Time limit: 60 minutes
• Passing score: 60%, i.e., 24 out of 40 correct
• Delivery: Pearson VUE test center or OnVUE remote proctoring
• Prerequisites: None
• Reference material allowed: None - the exam is closed book and supervised

Sixty minutes for 40 questions gives you an average of 90 seconds per question, but simple multiple-choice items on definitions and structure are usually answered much faster than that - leaving buffer time for the handful of questions that require you to recall a full ADM phase sequence or match deliverables to phases.

The 11 Exam Domains, Weighted

OG0-091 content is organized into 11 official domains, each with a fixed weighting. Understanding these weights is the single most efficient way to plan your study time - a topic worth 22.5% deserves dramatically more attention than one worth 5%.

For a domain-by-domain walkthrough of what each area actually covers, the complete guide to all 11 OG0-091 content areas breaks down every topic in detail. We also maintain dedicated study guides for the earlier domains, including Domain 1: Basic Concepts, Domain 2: Core Concepts, Domain 3: Introduction to the ADM, and Domain 4: The Enterprise Continuum and Tools.

Why ADM Phases Dominates the Exam

At 22.5% of the exam - roughly 9 of the 40 questions - Domain 5: ADM Phases is by far the heaviest single topic on OG0-091. This domain covers the full Architecture Development Method cycle: Preliminary Phase, Phase A (Architecture Vision) through Phase H (Architecture Change Management), and the central Requirements Management activity that touches every phase.

Expect questions that ask you to:

• Identify the objective or primary output of a specific ADM phase
• Place a described activity into its correct phase
• Recognize the correct sequence of phases and how Requirements Management interacts with the cycle
• Distinguish the purpose of similar-sounding phases (e.g., Phase B Business Architecture vs. Phase E Opportunities and Solutions)

Because this single domain can determine whether you clear the 24-out-of-40 passing threshold, it deserves first priority in any study plan. If you're unsure how tough this section really is relative to the rest of the exam, our OG0-091 difficulty guide walks through where most candidates lose points.

Question Style and Format

Every question on OG0-091 is "simple multiple-choice" - one question stem, four answer options, one correct answer. There are no complex scenario items, no multi-select questions, and no exhibits requiring analysis, which is a meaningful difference from harder Part 2-style exams elsewhere in the TOGAF track. That said, "simple" format does not mean simple content: many questions hinge on exact TOGAF terminology, where two answer options look nearly identical except for one precise word (e.g., "Architecture Vision" vs. "Architecture Definition Document").

Because the exam is closed book and supervised, you cannot rely on cross-referencing the standard mid-exam. This makes memorization of exact terms - not just conceptual understanding - a real requirement. Candidates researching what OG0-091 means or what OG0-091 stands for often assume it's a soft, conceptual exam; in practice it rewards precise recall.

Who Hires OG0-091 / TOGAF 9 Foundation Holders

TOGAF 9 Foundation is widely used as a baseline credential across enterprise IT, consulting, and government contracting environments where TOGAF is the standardized architecture framework. Roles that commonly list it as a requirement or strong preference include:

• Junior to mid-level enterprise architects
• Solution architects working within a TOGAF-governed organization
• IT business analysts and consultants supporting architecture teams
• Government and defense contractors, where TOGAF is frequently mandated
• Project and program managers who need architecture governance literacy

For a fuller picture of the roles and hiring patterns tied to this credential, see OG0-091 Jobs. If you're weighing whether the investment translates into career impact, the OG0-091 salary guide and our broader ROI analysis of the OG0-091 certification cover that question directly without relying on inflated claims.

A Domain-Weighted Study Schedule

Rather than a generic weekly template, this schedule allocates time proportional to each domain's actual exam weight, front-loading the heaviest topics.

This sequencing works because Domain 5 and Domain 6 together account for 37.5% of the exam - over one-third of your score - so mastering them early gives you a buffer before tackling the lighter, more scattered domains. For a more detailed walkthrough of preparation strategy, including how to structure practice tests, see the complete OG0-091 study guide for 2026.

What Happens After You Pass

Score 24 or higher out of 40 and you earn the TOGAF 9 Foundation certification. Two details matter here that differ from many other IT certifications:

• No expiration: TOGAF 9 Foundation does not expire and carries no renewal requirement or continuing education obligation.
• Partial credit forward: Passing OG0-091 counts toward the combined TOGAF 9 Certified credential, which also requires the Part 2 exam.

This makes OG0-091 a low-risk first step: once earned, it stays valid indefinitely, and it's a building block rather than a dead end. If you want a broader overview tying together the certification's structure, cost, and outcomes in one place, see our main OG0-091 Certification overview or the explainer on what the OG0-091 certification actually involves. Candidates also researching foundational terminology questions like what a OG0-091 is or exploring OG0-091 training options can use those resources alongside structured practice tests to validate readiness before booking the real exam.

Frequently Asked Questions