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Lean Six Sigma - Green Belt

  • Length 5 days
  • Inclusions Exam voucher
Course overview
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Why study this course

The IASSC Certified Lean Six Sigma Green Belt™ (ICGB™) is for professionals who have a solid working knowledge of the core elements of Lean Six Sigma Methodology and are leading improvement projects or serve as part of a team delivering more complex improvement projects and wanting a higher level of understanding of Lean Six Sigma.

The Lean Six Sigma (LSS) certifications are designed to support organisations in their mission to improve customer satisfaction, boost performance levels, and shorten the time-to-market. Professionals and consultants will benefit from LSS's potential for cross-industry application and increased salary.

A Lean Six Sigma Green Belt holder possesses a comprehensive understanding of all aspects of the Lean Six Sigma Method and is competent in the phases of Define, Measure, Analyse, Improve and Control (DMAIC) as defined by the IASSC Lean Six Sigma Body of Knowledge™.

Holding a Lean Six Sigma Green Belt shows an understanding of how to implement, perform, interpret, and apply Lean Six Sigma with a high level of proficiency.


This course pricing includes a voucher for the IASSC Certified Lean Six Sigma Green Belt Exam, which is an online proctored exam through PeopleCert.

The exam is:

  • Three hours (180 minutes) duration

  • 100 questions (multiple choice and true or false)

  • Pass mark is 70 out of 100 (i.e. 70%)

  • Closed book

After passing the exam, each student’s certificate will be made available to them via PeopleCert.

It is highly recommended that you spend some time each evening of this course reviewing and consolidating what you’ve learned, to be well prepared for the exam.

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What you’ll learn

After completing this course, you will have learned how to:

  • Understand the concepts, implementation, and objectives of Six Sigma

  • Use a structured approach to process improvement

  • Use DMAIC (Define, Measure, Analyse, Implement, and Control) methodology

  • Predict, prevent, and control defects in a process

  • Understand the elements of waste

  • Achieve sustainable quality improvement through process improvement

  • Understand the tools of process discovery

  • Understand variation in processes

  • Reduce variation in processes and achieve predicted outcomes

  • Identify, measure, and analyse process potential

  • Use inferential statistics

  • Use hypothesis testing

  • Understand when to use which Six Sigma methodology

  • Use Capability Analysis to control processes

  • Understand the interdependence of Lean tools

  • Prevent, identify, and control defects

  • Understand and use statistical process control

  • Train, document, monitor, respond, and align systems

  • Provide sustainable and cost-effective improvement in processes

PeopleCert Lean Six Sigma logo

Lean at Lumify Work

Lumify Work is an Accredited Training Organization with Gold status for PeopleCert courses and certifications including Lean Six Sigma. Lean focuses on efficiency through the minimisation of waste, errors, and delays, while Six Sigma focuses on quality and consistency, through processes improvement and variation reduction. The combination guarantees cost and time efficient products and services of the highest quality.

Who is the course for?

The Lean Six Sigma Green Belt certification is ideal for professionals who are looking to further develop their Lean Six Sigma knowledge and build their experience as either a team member or leader on an improvement Project where a higher level of the understanding of the Lean Six Sigma methodology is required.

Course subjects

Module 1: Define Phase

  • The Basics of Six Sigma

    • Meanings of Six Sigma

    • General History of Six Sigma and Continuous Improvement

    • Deliverables of a Lean Six Sigma Project

    • The Problem Solving Strategy Y = f(x)

    • Voice of the Customer, Business, and Employee

    • Six Sigma Roles and Responsibilities

  • The Fundamentals of Six Sigma

    • Defining a Process

    • Critical to Quality Characteristics (CTQs)

    • Cost of Poor Quality (COPQ)

    • Pareto Analysis (80:20 rule)

    • Basic Six Sigma Metrics (DPU, DPMO, FTY, RTY Cycle Time, and deriving these metrics)

  • Selecting Lean Six Sigma Projects

    • Building a Business Case and Project Charter

    • Developing Project Metrics

    • Financial Evaluation and Benefits Capture

  • The Lean Enterprise

    • Understanding Lean

    • The History of Lean

    • Lean and Six Sigma

    • The Seven Elements of Waste: Overproduction, Correction, Inventory, Motion, Overprocessing, Conveyance, Waiting

  • 5S: Sort, Straighten, Shine, Standardise, Self-Discipline

Module 2: Measure Phase

  • Process Definition

    • Cause and Effect / Fishbone Diagrams

    • Process Mapping, SIPOC, Value Stream Map

    • X-Y Diagram

    • Failure Modes and Effects Analysis (FMEA)

  • Six Sigma Statistics

    • Basic Statistics

    • Descriptive Statistics

    • Normal Distributions and Normality

    • Graphical Analysis

  • Measurement System Analysis

    • Precision and Accuracy

    • Bias, Linearity, and Stability

    • Gage Repeatability and Reproducibility

    • Variable and Attribute MSA

  • Process Capability

    • Capability Analysis

    • Concept of Stability

    • Attribute and Discrete Capability

    • Monitoring Techniques

Module 3: Analyse Phase

  • Patterns of Variation

    • Multi-Vari Analysis

    • Classes of Distributions

  • Inferential Statistics

    • Understanding Inference

    • Sampling Techniques and Uses

    • Central Limit Theorem

  • Hypothesis Testing

    • General Concepts and Goals of Hypothesis Testing

    • Significance; Practical vs. Statistical

    • Risk; Alpha and Beta

    • Types of Hypothesis Test

  • Hypothesis Testing with Normal Data

    • 1 and 2 sample t-tests

    • 1 sample variance

    • One Way ANOVA (Tests of Equal Variance, Normality Testing and Sample Size calculation, performing tests and interpreting results)

  • Hypothesis Testing with Non-Normal Data

    • Mann-Whitney

    • Kruskal-Wallis

    • Mood’s Median

    • Friedman

    • 1 Sample Sign

    • 1 Sample Wilcoxon

    • One and Two Sample Proportion

    • Chi-Squared (Contingency Tables)

Module 4: Improve Phase

  • Simple Linear Regression

    • Correlation

    • Regression Equations

    • Residuals Analysis

  • Multiple Regression Analysis

    • Non-Linear Regression

    • Multiple Linear Regression

    • Confidence and Prediction Intervals

    • Residuals Analysis

    • Data Transformation, Box Cox

Module 5: Control Phase

  • Lean Controls

    • Control Methods for 5S

    • Kanban

    • Poka-Yoke (Mistake Proofing)

  • Statistical Process Control (SPC)

    • Data Collection for SPC

    • I-MR Chart

    • Xbar-R Chart

    • U Chart

    • P Chart

    • NP Chart

    • Xbar-S Chart

    • CuSum Chart

    • EWMA Chart

    • Control Chart Anatomy

  • Six Sigma Control Plans

    • Cost Benefit Analysis

    • Elements of the Control Plan

    • Elements of the Response Plan



PeopleCert Exams

All PeopleCert exams are now conducted via online proctoring, with an improved web-based platform released in February 2024. Candidates can schedule their exam for any time within the voucher validity period of 12 months, to be taken anywhere, on any Windows or Mac computer. Live proctors will guide and invigilate the exam process. For full details please see PeopleCert's Guidelines for Web-Based Exam Driver.

Lumify Work cannot sell PeopleCert courses (AgileSHIFT®, ITIL®, Lean Six Sigma, MoP™, M_o_R™, MSP®, P3O®, PRINCE2®, and PRINCE2 Agile®) without the corresponding official exam as per requirement from PeopleCert.

Terms & Conditions

The supply of this course by Lumify Work is governed by the booking terms and conditions. Please read the terms and conditions carefully before enrolling in this course, as enrolment in the course is conditional on acceptance of these terms and conditions.

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