- The LSSGB passing score is a fixed 75% - you need roughly 45 of 60 questions correct.
- The exam has 60 multiple-choice/scenario questions in a 90-minute window, proctored in person.
- Process mapping, Facilitation, and Problem solving each carry 20% weight - 60% of the exam combined.
- The exam is open book/open notes with a calculator allowed, but only the exam browser may run.
The Exact LSSGB Passing Score
If you're preparing for the American Association for Lean Six Sigma Certification's (AALSSC) Lean Six Sigma Green Belt exam, the number that matters most is simple: 75%. That's the passing score set by AALSSC for the LSSGB credential. With 60 total questions on the exam, 75% translates to answering approximately 45 questions correctly out of 60.
There's no partial credit, no curve, and no domain-by-domain minimum published by AALSSC - your overall score across all six domains is what determines pass or fail. That said, because the six content areas are not weighted equally, a smart candidate treats the heavier domains as higher-priority study targets rather than spreading effort evenly across all topics.
Exam Format: 60 Questions, 90 Minutes
The LSSGB exam is administered online through AALSSC's testing platform, but with a candidate-arranged, approved in-person proctor - not a remote webcam service. Candidates have 90 minutes to answer 60 multiple-choice questions, several of which are scenario-based rather than simple recall. That works out to an average of 1.5 minutes per question, though scenario items involving process maps or root-cause analysis will naturally take longer than definitional questions.
Because scenarios make up a meaningful share of the question pool, memorizing definitions alone won't get you to 75%. You'll need to apply Lean Six Sigma tools to short case descriptions - interpreting a value stream map, selecting the right countermeasure, or identifying the correct root-cause technique for a described problem. For a deeper breakdown of what each scenario type tests, see how hard the LSSGB exam actually is before you assume this is a memorization-only test.
Key Takeaway
Budget your practice-test time the same way: roughly 90 seconds per question, with extra buffer time reserved for multi-part scenario items covering process mapping or problem-solving domains.
How the Six Domains Shape Your Score
Every one of the 60 questions is pulled from one of six domains, and the weighting is not evenly distributed. Three domains are tied as the largest, together accounting for 60% of the entire exam:
| Domain | Weight | Approx. Questions |
|---|---|---|
| Basics/Background of Lean Six Sigma | 10% | ~6 |
| Process mapping | 20% | ~12 |
| Facilitation | 20% | ~12 |
| Analyze data | 15% | ~9 |
| Problem solving | 20% | ~12 |
| Lean Six Sigma countermeasures | 15% | ~9 |
Notice that Process mapping, Facilitation, and Problem solving each sit at 20%. Combined, that's roughly 36 of the 60 questions on the exam - over half your score depends on mastering these three areas alone. If you're deciding where to spend limited study hours, this is the clearest signal available: weakness in any one of these three domains puts your 75% target at real risk.
Process Mapping (20%)
Candidates must read, interpret, and sometimes construct process flow diagrams and value stream maps, identifying waste, bottlenecks, and non-value-added steps.
- Recognize standard process mapping symbols and flow logic
- Identify where value-add vs. non-value-add steps occur in a scenario
Facilitation (20%)
This domain tests your ability to lead teams through Lean Six Sigma activities - running effective meetings, gathering stakeholder input, and managing group problem-solving sessions.
- Understand facilitation techniques for cross-functional improvement teams
- Know how to structure a kaizen event or process review session
Problem Solving (20%)
Expect scenario questions requiring you to select the correct root-cause tool or structured problem-solving approach for a described operational issue.
- Match the scenario to the right root-cause analysis tool
- Apply structured problem-solving logic, not just memorized steps
For a full walkthrough of every domain - including the two smaller ones - read the complete guide to all six LSSGB content areas. It pairs well with the official GB-2 job-task analysis referenced in the current Green Belt study guide.
What "Open Book" Really Means for Scoring
The LSSGB exam is open book and open notes, and a calculator is allowed - but this doesn't lower the bar as much as candidates assume. Because the proctor policy prohibits remote proctoring and restricts you to only the exam browser being open, you can't search the internet mid-exam or consult unstructured digital files. You need physical or pre-organized reference material you can flip to quickly within your 90-minute window.
Testing must occur in a public, distraction-free location with your own arranged proctor; home testing is only permitted through an approved accommodation. Plan your reference materials - a condensed one-page review of must-know facts works well here - around what's actually fast to locate under a ticking clock.
Registration, Fee, and Proctor Logistics
Before the passing score even becomes relevant, you have to get into the exam room (or approved testing space). The LSSGB exam fee is USD 395, and registration requires AALSSC application approval plus an acceptable proctor and testing location arranged by you, the candidate. Self-study is explicitly permitted - there's no mandatory training course requirement baked into eligibility, though structured LSSGB training can still shorten your prep timeline.
For a complete breakdown of what you'll pay across the certification lifecycle - not just the exam fee - see the full LSSGB certification cost breakdown. And if you're still confirming whether you meet the application criteria, review the eligibility and prerequisite requirements before you schedule anything.
Key Takeaway
Lock in your proctor and public testing location early. Since remote proctoring is prohibited under the current Version 10 proctor policy, scheduling logistics can take longer than the studying itself - don't leave this to exam week.
Allocating Study Time to Hit 75%
Given the domain weights, an effective study plan mirrors the exam's own emphasis rather than treating all six domains equally. Here's one way to sequence preparation across a multi-week runway, front-loading the heaviest domains first while leaving review time before test day.
Process Mapping & Facilitation (40% combined)
- Practice reading and building process flow diagrams
- Study facilitation techniques for improvement teams and meetings
Problem Solving & Countermeasures (35% combined)
- Drill root-cause analysis tool selection using scenario practice
- Review standard Lean Six Sigma countermeasures and when each applies
Analyze Data & Basics (25% combined)
- Review calculation methods usable with your open-book materials
- Cover foundational Lean Six Sigma background terminology
Full-Length Practice & Review
- Take timed 60-question practice exams under 90-minute conditions
- Revisit any domain scoring below your personal 75% target
This sequencing isn't generic - it directly reflects the fact that Process mapping, Facilitation, and Problem solving together make up 60% of your score. For a more detailed week-by-week strategy including recommended resources, see the full LSSGB study guide for passing on your first attempt. Running timed sessions on our LSSGB practice test platform is one of the most direct ways to see whether you're actually tracking toward 75% before exam day.
If You Miss the Passing Score
Not everyone clears 75% on the first attempt, and understanding the domain breakdown helps you diagnose why. If your score report shows weakness concentrated in Process mapping, Facilitation, or Problem solving, that's disproportionately costly given their combined 60% weight - prioritize re-studying those before attempting a retest. If your gaps sit in Analyze data or Lean Six Sigma countermeasures instead, targeted review of calculation methods and countermeasure selection criteria may close the distance faster.
Retesting is also one of the two accepted paths for recertification down the line (more on that below), so the skills you sharpen now aren't wasted even beyond your first attempt. For broader context on how candidates typically perform, review the discussion in what the pass rate data shows for LSSGB.
Keeping Your Score Relevant: Recertification
Passing the exam at 75% earns you a credential valid for three years. When it's time to renew, AALSSC offers a documentation-based path costing USD 59, requiring one professional-development activity plus two Lean Six Sigma projects or events that you led or facilitated. Retesting - clearing the same 75% threshold again - is the alternative route if you'd rather requalify by exam than by documentation.
Once you've earned the credential, the natural next questions are about career impact. Explore who hires for LSSGB roles, check the LSSGB salary guide, and weigh the broader question of whether LSSGB certification is worth the investment for your specific career stage.
Frequently Asked Questions
The passing score is 75%. With 60 total questions on the exam, that means answering approximately 45 questions correctly.
AALSSC publishes an overall 75% passing score based on total questions answered correctly, not separate minimum thresholds per domain. However, since Process mapping, Facilitation, and Problem solving each weight 20%, weakness in any of those three domains has an outsized impact on your overall percentage.
It helps with reference-based tasks like formulas in the Analyze data domain, but the exam browser restriction and in-person-proctor requirement mean you can't rely on live searching. Comprehension of process mapping, facilitation, and problem-solving scenarios still has to come from preparation.
Out of 60 questions, you can miss up to 15 and still meet the 75% passing threshold. Missing 16 or more results in a failing score.
You can retest. Review your performance by domain, prioritize the three 20%-weighted domains - Process mapping, Facilitation, and Problem solving - and consider running additional timed practice exams before scheduling another attempt.