Philosophical and Statistical difference between Green Belt and Black Belt Professionals

Philosophical and Statistical difference between Green Belt and Black Belt Professionals

Philosophical and Statistical difference between Green Belt and Black Belt Professionals

Friends, welcome back to our blog and our website. It is a delightful experience when we see you read our articles posted on our website.

We love your curiosity to understand the Philosophical and Statistical difference between the Green Belt and Black Belt professionals.

Below are some basic difference that we highlight however the below information is after doing a survey with many of the organizations and about 60% of organizations follow the below differences. While you continue to read this article, we hereby assume that you understand and realize Lean Six Sigma terminologies.

* Here are some difference highlighted below:

Green Belt

Black Belt

Work on VOC that are internal facing

Work on VOC, VOP, VOB and VOE that are both internal and external

Team Level projects

Client Facing projects


Account level projects that can spread across locations.


Trained to work as an individual contributor and work in clients location on critical projects

Black Belt mentor Green Belts to identify potential projects

Usage of QFD, Kano Models are used to identify opportunities for improvement

VA – NVA Analysis

Process Mapping and if need be VSM (Value Stream Mapping)


Work on Critical Success Factor


Establish Stakeholder Analysis

MSA if need be in Green Belt, Black Belt mentors and coaches in this project

Validation of “Y” metric using MSA

Baseline data would be Normal where P.Value => 0.05

Black Belts are expected to work where their baseline data will be either normal or non-normal


In the case wherein baseline data is non-normal; Black Belts assure the data is stable

Work on central tendency “MEAN”

Work on improving central tendencies like Medium, Mode, IQR including Mean

Work on projects were UNIT is defined as “1”

Black Belts are also trained on working in Projects wherein Units => 1; however still recommended to work on projects where Units = 1

Work on data types are either discrete or continuous normal data

Expected to work on projects where data needs to be continuous non normal data while they also work on discrete and continuous normal data

Usage of 7 QC Tools and Basic statistical tools to analyze the data

Equipped with advanced statistical tools in Lean Six Sigma giving them the leverage of using and analyzing any sort / kind of data in any time of environment


Expected to engage with senior stakeholders and get their contribution in forum like FMEA – Failure Mode Effect Analysis, Ideation forum like Assumption Busting and VOC on ideas


Visual Management, 5S, Kanban and Poka Yoke


Cost benefit analysis

Certified Lean Master Black Belt Lead Auditor
Master Black Belt, Speaker & Author

A Certified Master Black Belt in Lean Six Sigma Methodology; Certified Lead Auditor in ISO 9001(QMS) and ISO 27001(ISMS); and PMP with 26 years of overall experience and 15 years in Quality Assurance, Process Excellence, Transformation and Innovation, Design Thinking, RPA.

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