Certified Lean Six Sigma
Certification (CLSS)
Validate your Lean Six Sigma knowledge and professional competence through Quality Progress Certification Board — Independent certification examination · Optional training available · Lifetime credential validity.
Get Certified in 3 Simple Steps
Anyone can participate. Apply, Qualify, submit your project (if applicable), and earn your credential from the Quality Progress Certification Board.
Check Eligibility
Review prerequisites for your target certification level. Open to all backgrounds.
Register & Pass Exam
Register, pay, and take the secure online proctored examination.
Get Board Certified
Upon passing and meeting criteria, receive your official CLSS certificate.
🌍 Open to All — Anyone Can Participate and Get Certified
Quality Progress Certification Board welcomes participants from all backgrounds worldwide.
Whether you gained your knowledge through work experience, independent learning, or prior education — you are welcome to register. There are no mandatory training requirements. Simply choose your certification level, Apply, Qualify, meet the criteria, and become a Certified Lean Six Sigma professional.
The Body of Knowledge for each level serves as your guide. Prepare using any resources you choose — the exam assesses your competency.
📖 Body of Knowledge Framework Reference
Curriculum aligned with internationally recognized Lean Six Sigma Bodies of Knowledge including frameworks commonly used by ASQ, IASSC, CSSC, ILSSI, and ISSAC.
American Society for Quality · International Association for Six Sigma Certification · Council for Six Sigma Certification · Canadian Lean Six Sigma Council · International Lean Six Sigma Institute
Choose Your Certification
Training is optional. All credentials issued by the Quality Progress Certification Board.
Certified Lean Six Sigma
Yellow Belt
CLSSY
Intermediate Level
- 1Globally Accessible
- 2Optional Training Available
- 3Digital Badges Verification
- 460-Question Online Exam
- 52-Hour Time Limit
- 670% Passing Score
- 7No Prerequisites — Open to All
- 88 Knowledge Areas | No Project
Certified Lean Six Sigma
Green Belt
CLSSGB
Advanced Level
- 1Globally Accessible
- 2Optional Training Available
- 3Digital Badges Verification
- 4100-Question Online Exam
- 52-Hour Time Limit
- 670% Passing Score
- 73+ Years Work Experience
- 814 Knowledge Areas | 1 Project
Certified Lean Six Sigma
Black Belt
CLSSBB
Expert Level
- 1Globally Accessible
- 2Optional Training Available
- 3Digital Badges Verification
- 4150-Question Online Exam
- 53-Hour Time Limit
- 675% Passing Score
- 7CLSSGB + 5+ Years Exp.
- 814 Knowledge Areas | 2 Projects
Certified Lean Six Sigma
Master Black Belt
CLSSMBB
Master Level — Pinnacle
- 1Globally Accessible
- 2Optional Training Available
- 3Digital Badges Verification
- 4200-Question Online Exam
- 54-Hour Time Limit | 80% Pass
- 6Live + AI Dual Proctoring
- 7CLSSBB + 7+ Years Exp.
- 816 Domains | Portfolio + Panel Defense
🏆 Quality Progress Certification Board
An independent, globally recognized certification body. All CLSSY, CLSSGB, CLSSBB, and CLSSMBB credentials are officially issued and verified. Our Body of Knowledge is developed with reference to internationally recognized Lean Six Sigma frameworks — ensuring comprehensive, credible certification. Anyone can participate — Apply, Qualify, Certify.
Prerequisites At a Glance
Optional Training Available — we assess your knowledge through the Certification Requirements.
| Certification | Designation | Prerequisites | Exam | Project | Fee |
|---|---|---|---|---|---|
| Yellow Belt | CLSSY | Open to All | 60 Qs | 2 Hrs | 70% | No | Regular Fee: $49 After Discount: $30 |
| Green Belt | CLSSGB | 3+ yrs exp. OR CLSSY | 100 Qs | 2 Hrs | 70% | 1 DMAIC Project | Regular Fee: $99 After Discount: $60 |
| Black Belt | CLSSBB | CLSSGB + 5+ yrs exp. | 150 Qs | 3 Hrs | 75% | 2 Projects | Regular Fee: $199 After Discount: $100 |
| Master Black Belt | CLSSMBB | CLSSBB + 7+ yrs exp. | 200 Qs | 4 Hrs | 80% | Portfolio + Panel | Regular Fee: $399 After Discount: $150 |
Apply for Certification
Complete the registration form below. Quality Progress will contact you within 24 hours.
📧 Email: admission@qualityprogressbd.com · 📱 WhatsApp: 1954-577058
Important Links
Quick access to policies, verification, and more.
Examination Policy
Exam format, time limits, passing scores, retakes, security
Certification Policies
Eligibility, appeals, code of ethics, refunds
Verify Certificate
Instant online CLSS verification
Our Assessors
Master Black Belts & certification panel
Payment Portal
Secure exam fee payment
Main Website
Complete information & updates
Have Questions?
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