About the exam
Six Sigma GB Exam structure
Six Sigma Green Belt prep with 601 original DMAIC practice questions, statistics and Lean drills, flashcards, weighted mocks, and topic recovery.
Issuer and path
Six Sigma Green Belt Exam Prep is administered through ASQ / CSSC / PeopleCert (IASSC). Check official resources before booking, retesting, or relying on a stale requirement.
Define Phase
20 scored + 0 pretest
Six Sigma foundations, VOC, CTQ, project selection, charters, roles, SIPOC, process thinking, Lean basics, waste, and 5S.
Measure Phase
20 scored + 0 pretest
Process maps, data collection, operational definitions, basic statistics, measurement system analysis, capability, and baseline metrics.
Analyze Phase
20 scored + 0 pretest
Variation patterns, graphical analysis, inferential statistics, hypothesis tests, root cause analysis, correlation, regression, and FMEA logic.
Improve Phase
20 scored + 0 pretest
Solution generation, Lean improvement, pilot planning, mistake proofing, regression use, design choices, risk reduction, and implementation.
Control Phase
20 scored + 0 pretest
Control plans, SPC, response plans, standard work, visual controls, Kanban, documentation, benefit capture, and sustainment.
Before you register
Confirm which Green Belt provider you are using, because ASQ, CSSC, IASSC, and training-provider exams can differ in eligibility, open-book rules, timing, delivery, retakes, and recertification.
Official Outline Coverage Map
Coverage is mapped to official outline item counts so content depth can be checked without hard-coding a single exam.
| Topic | Official outline items | Your questions | Your flashcards | Confidence |
|---|---|---|---|---|
| Six Sigma Foundations | 5 | 30 | 8 | Priority |
| Project Charter, VOC, and SIPOC | 10 | 61 | 10 | Priority |
| Lean Basics, Waste, and 5S | 5 | 30 | 10 | Priority |
| Data Collection and Basic Statistics | 10 | 60 | 10 | Priority |
| MSA, Capability, and Metrics | 10 | 60 | 10 | Priority |
| Variation and Root Cause | 5 | 30 | 10 | Priority |
| Hypothesis Testing | 10 | 60 | 10 | Priority |
| Correlation and Regression | 5 | 30 | 10 | Priority |
| Solution Selection and Pilots | 13 | 80 | 10 | Priority |
| Lean Improvement Tools | 7 | 40 | 10 | Priority |
| SPC and Control Charts | 13 | 80 | 10 | Priority |
| Control Plan and Sustainment | 7 | 40 | 10 | Priority |
How to use this guide
How to study for Six Sigma Green Belt
Use DMAIC as the map: define the problem and customer need, measure the process, analyze causes, improve the system, and control the gains.
Name the DMAIC phase
Identify whether the scenario is defining, measuring, analyzing, improving, or controlling.
Match the data and tool
Check whether the data are continuous or attribute and whether the tool answers the question.
Validate the cause or solution
Prefer evidence, pilot results, and risk checks over opinion or premature solutions.
Hold the gain
Choose control plans, monitoring, response plans, and process-owner handoff when improvement must be sustained.
Six Sigma Foundations
Foundation questions test DMAIC purpose, Y=f(x), Green Belt role, VOC, CTQ, customer value, defect thinking, and process improvement vocabulary.
Key rules
Rule 1
Green Belt questions usually ask which DMAIC phase, tool, metric, or team action fits the current situation.
Exam cue: Identify the DMAIC phase before selecting the tool.
Rule 2
The strongest answer connects customer need, process behavior, data, and sustainable improvement.
Exam cue: Translate vague customer language into a measurable CTQ.
Rule 3
Tool choice should follow the problem and data, not personal preference.
Exam cue: Ask whether the answer improves the process or merely hides the defect.
Common traps
Jumping to a solution before the problem is defined.
Prevention: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Confusing project activity with customer value.
Prevention: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Using a metric without an operational definition.
Prevention: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Memory anchors
DMAIC
DMAIC means Define, Measure, Analyze, Improve, and Control for structured process improvement.
Y=f(x)
Y=f(x) frames the output as a function of input and process variables.
VOC
Voice of the Customer captures customer needs, expectations, and pain points.
CTQ
Critical-to-quality characteristics translate customer needs into measurable requirements.
Defect
A defect is a failure to meet a defined customer or process requirement.
Green Belt Role
A Green Belt supports and leads focused improvement work using data and DMAIC tools.
Process
A process converts inputs into outputs through repeatable activities.
Customer Value
Value is defined by what the customer needs and is willing to accept.
Next best moves
Quick check-up
Use a short quiz to confirm the rule pattern is actually sticking.
Check-up Questions
A team has confirmed the customer problem but has not established a reliable baseline. Which DMAIC phase should receive the team's attention next?
In the relationship Y=f(x), what does Y represent?
Answer all questions to submit.
Next step personalized recommendations
Open another topic next
Official resources
Verify the details with the official sources
Use these links for eligibility, scheduling, handbook rules, and issuer updates. Our guide helps you study; official sources tell you what the testing partner currently requires.
ASQ Six Sigma Green Belt Certification
Official ASQ CSSGB page with requirements, exam details, open-book policy, and body-of-knowledge references.
CSSC Six Sigma Green Belt Certification
Official CSSC standard Green Belt certification page with exam format, scoring, attempts, and body-of-knowledge reference.
PeopleCert IASSC Lean Six Sigma Green Belt
Current PeopleCert page for the IASSC Green Belt exam, including DMAIC coverage, question count, timing, closed-book policy, passing mark, and renewal.
FAQ
Common Six Sigma GB questions
Is this the official ASQ, CSSC, or PeopleCert IASSC exam?
No. These are original practice questions aligned to public Green Belt body-of-knowledge and exam-format guidance. They are not copied from secure exam material.
Which Green Belt certification does this target?
The content is broad Green Belt prep. It emphasizes ASQ CSSGB depth while using DMAIC topics common to ASQ, CSSC, and PeopleCert IASSC Green Belt guidance.
Does the bank include statistics?
Yes. The bank includes basic statistics, measurement system analysis, capability, hypothesis testing, regression, SPC, and interpretation drills.
What should I study first?
Start with DMAIC purpose, project charters, VOC, CTQs, process maps, and basic metrics. Then move into statistics, root cause, improvement, and control plans.
How should I use the 601 questions?
Use section drills by DMAIC phase, math drills for statistics and SPC, topic drills for weak tools, then 100-question mixed mocks.