IASSC Lean Six Sigma Green Belt
Unlimited IASSC Lean Six Sigma Green Belt practice exam retakes, each drawn fresh from a question pool weighted by the official exam domains — covering the Define, Measure, Analyze, Improve, and Control phases of the DMAIC methodology. Aligned to the IASSC Green Belt body of knowledge.
Exam mode Default
180-minute timer, flag for review and a review screen before you submit — just like test day.
Practice mode
See the correct answer, the exam domain and a full explanation after every question.
What you get
- A 195-question pool — every attempt draws 65 fresh questions weighted by the official exam domains
- Unlimited retakes, lifetime access
- Score report by exam domain, with your score trend over time
- Answer review with explanations and reference links
- Original, blueprint-aligned questions — never exam dumps
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Exam domains
Every attempt draws questions in these official proportions. Open a domain to see the subtopics it covers.
Define Phase20%
- The basics of Six Sigma, including Y = f(x), voice of the customer and roles
- The fundamentals of Six Sigma: CTQs, cost of poor quality, Pareto analysis and metrics
- Selecting Lean Six Sigma projects: business case, project charter and project metrics
- Financial evaluation and benefits capture
- The Lean enterprise: the seven elements of waste and 5S
Measure Phase20%
- Process definition: fishbone diagrams, process mapping, SIPOC and value stream maps
- X-Y diagrams and Failure Modes and Effects Analysis (FMEA)
- Six Sigma statistics: descriptive statistics, normality and graphical analysis
- Measurement System Analysis, including Gage R&R and attribute MSA
- Process capability and the concept of stability
Analyze Phase20%
- Patterns of variation: multi-vari analysis and classes of distributions
- Inferential statistics: sampling techniques and the central limit theorem
- Hypothesis testing concepts: practical vs statistical significance, alpha and beta risk
- Hypothesis testing with normal data: 1 and 2 sample t-tests, variance tests, one-way ANOVA
- Hypothesis testing with non-normal data: Mann-Whitney, Kruskal-Wallis, Mood's median
- Proportion tests and Chi-squared contingency tables
Improve Phase20%
- Simple linear regression: correlation and regression equations
- Residuals analysis
- Multiple linear and non-linear regression analysis
- Confidence and prediction intervals
- Data transformation using Box-Cox
Control Phase20%
- Lean controls: control methods for 5S, Kanban and Poka-Yoke (mistake proofing)
- Statistical Process Control (SPC) and data collection for SPC
- Control charts: I-MR, Xbar-R, Xbar-S, U, P, NP, CuSum and EWMA
- Six Sigma control plans: cost benefit analysis, control plan and response plan
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