ICGB Verified 2026 Edition

Iassc Certified Lean Six Sigma Green BeltPractice Test

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Exam Information

Official specifications published by Six Sigma

Exam Format

180 min (3 hr)
100
70%
Green Belt

Registration

$350 USD
Pearson VUE, PeopleCert Online Proctoring, or online proctoring
English, Spanish, Portuguese, Chinese +1 more

Validity

perpetual
Certification is recognized perpetually; Current status maintained for 3 years; Recertification available through IASSC Recertification Policy

ICGB Exam Topics and Domains

ICGB is organized into 5 weighted domains. Expect to work with Minitab ANOVA, Minitab attribute agreement analysis, Minitab Box-Cox, Minitab C charts, and more.

1

Define Phase

20%

The Basics of Six Sigma

Meanings of Six SigmaGeneral History of Six Sigma & Continuous ImprovementDeliverables of a Lean Six Sigma ProjectThe Problem Solving Strategy Y = f(x)Voice of the Customer, Business and EmployeeSix Sigma Roles & Responsibilities
  • Understand the fundamental concepts and history of Six Sigma
  • Identify and define roles within Six Sigma organizations
  • Apply the Y=f(x) problem-solving approach

The Fundamentals of Six Sigma

Defining a ProcessCritical to Quality Characteristics (CTQ's)Cost of Poor Quality (COPQ)Pareto Analysis (80:20 rule)Basic Six Sigma Metrics
  • Define and map business processes
  • Calculate and interpret Six Sigma metrics
  • Apply Pareto principle for prioritization

Selecting Lean Six Sigma Projects

Building a Business Case & Project CharterDeveloping Project MetricsFinancial Evaluation & Benefits Capture
  • Select appropriate Six Sigma projects
  • Develop comprehensive project charters
  • Calculate project financial benefits

The Lean Enterprise

Understanding LeanThe History of LeanLean & Six SigmaThe Seven Elements of Waste5S
  • Understand Lean principles and history
  • Identify and eliminate seven wastes
  • Implement 5S methodology
2

Measure Phase

20%

Process Definition

Cause & Effect / Fishbone DiagramsProcess Mapping, SIPOC, Value Stream MapX-Y DiagramFailure Modes & Effects Analysis (FMEA)
  • Map and analyze processes comprehensively
  • Identify potential failure modes
  • Establish cause-effect relationships

Six Sigma Statistics

Basic StatisticsDescriptive StatisticsNormal Distributions & NormalityGraphical Analysis
  • Calculate and interpret descriptive statistics
  • Assess data normality
  • Create and analyze statistical graphs

Measurement System Analysis

Precision & AccuracyBias, Linearity & StabilityGage Repeatability & ReproducibilityVariable & Attribute MSA
  • Assess measurement system capability
  • Conduct GR&R studies
  • Interpret MSA results

Process Capability

Capability AnalysisConcept of StabilityAttribute & Discrete CapabilityMonitoring Techniques
  • Calculate process capability indices
  • Assess process stability
  • Convert between different capability metrics
3

Analyze Phase

20%

Patterns of Variation

Multi-Vari AnalysisClasses of Distributions
  • Identify patterns in process variation
  • Recognize different statistical distributions

Inferential Statistics

Understanding InferenceSampling Techniques & UsesCentral Limit Theorem
  • Apply inferential statistics concepts
  • Determine appropriate sample sizes
  • Understand Central Limit Theorem

Hypothesis Testing

General Concepts & Goals of Hypothesis TestingSignificance; Practical vs. StatisticalRisk; Alpha & BetaTypes of Hypothesis Test
  • Formulate and test hypotheses
  • Interpret hypothesis test results
  • Understand statistical risks

Hypothesis Testing with Normal Data

1 & 2 sample t-testsOne-Way ANOVATest for Equal Variances
  • Conduct hypothesis tests with normal data
  • Select appropriate test methods
  • Interpret test results correctly

Hypothesis Testing with Non-Normal Data

Mann-WhitneyKruskal-WallisMood's MedianFriedman1 Sample Sign1 Sample WilcoxonOne and Two Sample ProportionChi-Squared (Contingency Tables)
  • Apply non-parametric tests appropriately
  • Select between parametric and non-parametric methods
  • Interpret non-parametric test results
4

Improve Phase

20%

Simple Linear Regression

CorrelationRegression EquationsResidual Analysis
  • Perform correlation analysis
  • Build and interpret regression models
  • Validate regression assumptions

Multiple Regression Analysis

Non-Linear RegressionMultiple Linear RegressionConfidence & Prediction IntervalsResiduals AnalysisData Transformation, Box Cox
  • Build multiple regression models
  • Handle non-linear relationships
  • Apply data transformations
5

Control Phase

20%

Lean Controls

Control Methods for 5SKanbanPoka-Yoke (Mistake Proofing)
  • Implement lean control methods
  • Design visual management systems
  • Apply mistake proofing techniques

Statistical Process Control (SPC)

Data Collection for SPCI-MR ChartXbar-R ChartU ChartP ChartNP ChartXbar-S ChartC ChartEWMA Chart
  • Select appropriate control charts
  • Calculate control limits
  • Interpret control chart patterns

Six Sigma Control Plans

Cost Benefit AnalysisElements of the Control PlanElements of the Response Plan
  • Develop comprehensive control plans
  • Create response procedures
  • Evaluate control effectiveness

How do I earn this certification?

Passing ICGB earns the Certified Lean Six Sigma Green Belt certification. It sits in the Six Sigma Quality track.

Current Level Exams
  • ASQ-CSSGB - ASQ Certified Six Sigma Green Belt
  • CSSC-CSSGB - Council for Six Sigma Green Belt
Next Level Options
Alternative Paths

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How to study for this exam?

Use the official PlanetCert Practice Test alongside the study plan below to prepare efficiently for ICGB.

What's changed on this exam?

Current Status
  • ACTIVE
  • Last content update: 2024-01-01
Updates
  • Minitab Statistical Software 22 New features may appear in future exam updates • Release date: 2024-06-01
  • Python for Six Sigma Various libraries Alternative to traditional tools, not yet in exam • Release date: Ongoing
  • R Statistical Computing 4.3+ Alternative statistical tool, growing adoption • Release date: 2024-04-01

Who should take this exam?

This exam is typically taken by Quality professionals and Process improvement practitioners.

  • Basic understanding of statistics
  • Experience with process improvement
  • Familiarity with quality management concepts
  • Previous exposure to Lean or Six Sigma concepts

What jobs can I get with this?

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