Lean Six Sigma Green Belt


“Six Sigma is a quality program that ultimately improves the customer experience, reduces costs, and creates better leaders”

Jack Welch, Former CEO of GE

Who is it for?

Lean Six Sigma Green Belt certification is issued to Six Sigma professionals who work closely with Black Belts, who are responsible for most of the Six Sigma data collection. As this methodology is highly statistical in nature, it is of the utmost importance to start with a complete set of valid and accurate data. Green Belts are usually employees of a Six Sigma company who also have other day-to-day responsibilities within that company.

Occasionally, a Green Belt may also fill minor leadership roles within a Six Sigma team, particularly for small-scale projects. They are well educated in the proper use of Six Sigma tools and employ them under the direction of a Black Belt project leader.

What you will learn

  • How to apply Lean Six Sigma tools
  • How to manage complex problems in a structured way
  • Descriptive and inferential statistics tools
  • How to find root-causes and implement corrective actions
  • How to use control charts
  • How to implement a control plan

Course contents

Below is the Body of Knowledge for the Green Belt certification:

  • Basics of Six Sigma
    • Meanings of Six Sigma
    • History of Six Sigma and Quality Management
  • The Lean Enterprise
    • Understanding Lean
    • History of Lean
    • The 7 wastes
    • Make the value flow
  • Lean Six Sigma Approach
    • When utilizing Lean and Six Sigma
    • The Problem Solving Strategy y=f(x)
    • Roles & Responsibility in a  Lean Six Sigma organization
    • DMAIC and DMADV approaches
  • The Voice of the Customer
    • Collect client’s expectations
    • Kano Model
  • Define the process
    • Preliminary process mapping
    • Building a flowchart
  • Understanding Quality
    • Critical to Quality Characteristics (CTQ’s)
    • Cost of Poor Quality (COPQ)
  • Define the problem
    • Problem Statement
    • Introduction to PFMEA
  • Basic Six Sigma metrics
    • DPU, DPMO, FTY, RTY, Cycle time
    • Process Performance
  • Project Management tools
    • Goal statement
    • Project scope
    • Business case
    • Planning
    • Stakeholders analysis
    • Project metrics
    • Project team
    • Project Charter
  • Project Team Management
    • Roles definition
    • Team formation
    • Team management
  • Selecting Lean Six Sigma projects
    • Prioritization Matrix
    • Pareto Diagram (80:20 rule)
  • Detailed process mapping
    • SIPOC
    • Value Stream Mapping
    • Spaghetti Chart
    • Gemba Walk
  • Data collection
    • Categories of data (continuous, discrete, attributes)
  • Six Sigma Statistics
    • Probability
    • Descriptive Statistics
    • Normal distributions & normality test
  • Process Capability Study
    • Continuous Data
    • Attribute Data
    • Short and Long-term Capability
  • Graph Analysis
    • Histogram
    • Box Plot
    • Run Charts / Time series
  • Measurement System Analysis
    • Precision & Accuracy
    • Bias, Linearity & Stability
    • Gage Repeatability & Reproducibility
    • variable and attributes MSA
  • Sampling
    • Sample size
  • Root Cause Analysis
    • 5-why
    • Fishbone diagram
  • Pattern of variation
    • Multi-Vari Analysis
    • Scatter Diagram
  • Inferential Statistics
    • Understanding inference
    • Sampling techniques
    • Central Limit Theorem
  • Hypothesis Testing
    • General Concepts and goals
    • Difference between Statistical & Practical significance
    • Alpha and Beta Risk
    • Types of Hypothesis Test
  • Hypothesis Tests with Normal-distributed data
    • 1 & 2 sample t-tests
    • 1 sample variance
    • One Way ANOVA
  • Hypothesis Tests with non-normal distributed data
    • Overview of Mann-Whitney, Kruskal-Wallis and Mood’s Median
  • Hypothesis Test with discrete data
    • Chi squared test
  • Simple Linear Regression
    • Correlation
    • Regression Equations
    • Residuals Analysis
  • Multiple Regression Analysis
    • Non Linear Regression
    • Multiple Linear Regression
  • Confidence and Prediction Intervals
    • Residuals analysis
  • Design of Experiments (DOE)
    • Basic terminology
    • Charts and plots
  • Lean tools
    • SMED
    • Kaizen and Kaizen blitz
    • Kanban
    • Poka-Yoke
  • Statistical Process Control (SPC)
    • Control Charts Overview
    • I-MR Chart
    • Xbar-R Chart
    • U Chart
    • P Chart
    • NP Chart
    • Xbar-S Chart
  • Control Plan
    • Control Plan elements
  • Lean tools
    • 5S
    • Andon
    • Standard Work
    • Total Productive Maintenance (TPM)
  • Closing
    • Verify benefits
    • New process performance (z)
    • Lessons learned
    • Closing

Course information

Face to face

At the customer




40h, or 5 days

Final Test

2h, 100 questions


The Lean Six Sigma Green Belt certification course can be delivered in different formats:

  • Face to face, at the customer
  • Online, through a mix of webinars and remote exercises
  • Blended, through a mix of face-to-face lectures and remote webinars

We think that the blended mode has several advantages from the point of view of flexibility, costs and practical exercises and is therefore recommended above all for company training groups.

Training Material

The teacher will provide students with the slides necessary for learning the theoretical part. In addition, he will provide a manual as additional support material.

For the entire duration of the course, the teacher is available to answer any questions or doubts via email, or by setting up a short videoconference with the student.

For the practical part, the student will have free access for 30 days to the Minitab statistical software. In addition, the teacher will provide a series of spreadsheets in Excel format for carrying out some exercises.


The course has a total duration of 40h (or 5 full-time days) to which it is recommended to add at least ten hours for individual study and exercises.


At the end of the course, each student will have to present a short project in which the methodology and some of the main Lean Six Sigma tools are applied. The project will then be discussed with the teacher.

Test methods

The exam can take place in written form (in person) or in digital format (remotely) by accessing a dedicated platform. The student will have to answer a series of 100 questions in a time limit of 2 hours. To pass the exam, the student must correctly answer at least 70% of the questions.


Costs vary by format (face-to-face or remotely) and by groups. We also provide individual courses on request.

To find out the costs, contact us via email at

[email protected] 


Accialini Consulting is internationally accredited by the Council for Six Sigma Certification 

The Council for Six Sigma Certification

Discover the other certifications

If you are new to the Lean Six Sigma methodology and want to proceed step by step, then you can start with the White Belt certification to get a general overview, then move on to the Yellow Belt and then to the Green Belt.


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