Why Are There So Many Lean Six Sigma Certifying Bodies?

Why are there so many different options for Lean Six Sigma Certifications?  The simple answer is that there is not one single certifying body for Lean Six Sigma. The existence of multiple Lean Six Sigma certification companies arises from a variety of factors, including differing approaches to training, certification standards, and the global demand for Lean Six Sigma expertise. Here’s an overview of why these different certifying organizations exist:

1. No Single Governing Body

Lean Six Sigma is not governed by a single global standard or accrediting body, which has allowed various organizations to establish their own certification programs. This decentralization enables certification providers to cater to different industries, regions, and training needs.

2. Diverse Industry Needs

Different industries (e.g., healthcare, manufacturing, IT) have unique process improvement challenges. Certification providers tailor their offerings to address these needs. Some companies emphasize Lean principles (eliminating waste), while others focus on Six Sigma (statistical quality control) or integrate both equally.

3. Market Demand

As Lean Six Sigma has grown in popularity, numerous organizations have emerged to meet the demand for training and certification. Providers offer varying levels of certifications (e.g., White, Yellow, Green, Black, Master Black Belt) and adapt their programs for international audiences.

4. Differing Standards and Approaches

Some certifying bodies (like ASQ) are more academically rigorous and require project completion, while others (like IASSC) focus on standardized exams that validate knowledge.  Providers offer a mix of online, in-person, and hybrid training options, allowing professionals to choose based on their schedules and learning preferences. Companies like CSSC cater to budget-conscious learners with affordable or free options, while others target corporate clients with premium training packages.

5. Competition and Differentiation

Some organizations focus solely on certifying (e.g., IASSC), while others combine training and certification (e.g., PM-ProLearn, GoLeanSixSigma, LSSI). Providers compete by offering unique features like tailored coaching, industry-specific case studies, or bundled project tools.  Organizations such as ASQ have a long history in quality management, giving their certifications prestige, while newer entrants differentiate through accessibility or innovation.

6. Accessibility and Inclusivity

Different certifying bodies target various audiences, from entry-level employees to seasoned professionals. Organizations offer training in different languages and formats to accommodate learners worldwide.

7. Certification Philosophy

Some organizations prioritize theoretical knowledge (e.g., IASSC), while others emphasize practical application and project experience (e.g., ASQ, PM-ProLearn, LSSI).  Certain providers require the completion of real-world projects to earn certification, whereas others focus solely on passing an exam.

8. Regional Preferences

Some organizations have stronger recognition and presence in specific regions. For example:

• ASQ: Strong in North America.

• IASSC: Globally neutral and widely recognized.

• PM-ProLearn: Project Management industry

• Corporate Providers: Focus on regional corporate training.

9. Continuous Improvement and Innovation

Certification companies regularly update their curriculum to include emerging topics like agile methodologies, digital transformation, or sustainability. Some providers combine Lean Six Sigma with project management methodologies (e.g., PMP, Agile).

The diversity in Lean Six Sigma certification companies allows professionals to select the certifying body that best aligns with their:

• Industry needs.

• Career goals.

• Budget.

• Preferred learning style.

While the variety can be overwhelming, it ultimately fosters accessibility, specialization, and innovation within the field. When choosing a certifying body, consider its reputation, focus, and alignment with your personal and professional objectives.

List of Companies/Organizations That Provide Lean Six Sigma Certifications Along with a Comparison

1. PM-ProLearn

PM-ProLearn is a training provider that focuses on the integration of project management techniques with process improvement initiatives. The company is well known in the project management industry. They offer training programs tailored to equip candidates with the necessary knowledge and skills for their Lean Six Sigma for Project Managers (LSSPM) Certification Exam as well as the IASSC and ASQ certification exams.  Offering in-person, virtual and self-paced training engaging in practical projects and case studies to enhance understanding and application of the concepts. 

The LSSPM is recognized by the Council for Six Sigma Certifications (CSSC) and administered by PM-ProLearn.  It is designed to assess a practitioner's proficiency in both Lean Six Sigma methodologies and project management principles. This certification is particularly beneficial for professionals aiming to integrate process improvement strategies within project management frameworks.

The exam format is scenario based, multiple choice, open-book, proctored online exam (Green Belt) and a scenario based, multiple choice, open-book, non-proctored online exam (Yellow Belt).

2. International Association for Six Sigma Certification (IASSC)

IASSC is a neutral, non-training-focused certification that emphasizes knowledge validation.  It focuses on standardized exams and third-party certification. They are focused solely on Lean Six Sigma certifications offering certifications at White, Yellow, Green, and Black Belt levels.  Exams test knowledge of Lean Six Sigma tools and concepts, independent of any training program. IASSC is widely recognized globally, and training is provided through third-party organizations (e.g. PM-ProLearn), not directly by IASSC.  No project completion is required for certification.

The exam format is a timed, proctored multiple choice exams.

3. American Society for Quality (ASQ)

ASQ has high credibility and integrates quality management principles.  It focuses on quality and process improvement.  ASQ offers Lean Six Sigma Green Belt, Black Belt, and Master Black Belt certifications and have a strong reputation in North America and globally in the quality field. Exams emphasize real-world application of Lean Six Sigma principles. Training is optional and not required to take the certification exam but requires documented project experience for higher-level certifications.

The exam format is a timed, proctored multiple choice exams. Some higher certifications include essay questions (e.g., Master Black Belt).

4. Council for Six Sigma Certification (CSSC)

CSSC is a budget-friendly option for individuals and organizations. They are focused on accessibility and affordability in Lean Six Sigma certification offering White, Yellow, Green, and Black Belt certifications. They have a growing reputation, particularly for cost-effective certifications with some certification exams free with low-cost training materials.  Offers both self-paced and guided training options through affiliates. Does not require project completion for lower certifications but does for the highest level certifications.

The exam format is online, open-book exams.

5. Lean Six Sigma Institute (LSSI)

LSSI focuses on the practical application of Lean Six Sigma principles.  They are recognized in industries emphasizing practical implementation.  Great for professionals seeking a hands-on, practical learning approach.  They emphasize hands-on project experience offering Lean Six Sigma certifications at all belt levels.  LSSI integrates Lean and Six Sigma principles with a practical focus.  Training and certification are bundled and directly provided by LSSI (required for certification).

The exam format is a combination of knowledge testing and project assessments.

6. Management and Strategy Institute (MSI)

MSI is an affordable and accessible certification for professionals and organizations. Less recognized than IASSC or ASQ but growing among small businesses.  MSI offers low-cost, self-paced learning for professionals with limited budgets.  They offer Lean Six Sigma certifications at all levels. Self-paced online training and certification.  Training and certification bundled together with training included in the certification package.  No project completion requirement.

The exam format is online, multiple-choice exams.

7. Other Corporate and Training Providers (e.g., PM-ProLearn, Six Sigma Global Institute, GoLeanSixSigma, etc.)

Training providers provide training programs that are practical and tailored to specific organizational needs. The recognition of the providers vary; some are well-known within specific industries or regions.  Often focus on practical projects and industry-specific applications.  Training and certification are bundled with training generally required but often customized for clients.  Some require project completion.

The exam format is often knowledge assessments, project reviews, or a combination.

Comparison of Major Certifying Bodies 

Certifying Body	Focus	Exam Req	Project Req	Recognition	Cost	Training
PM-ProLearn	LSS from a Project Perspective	Online Proctored Exam	No	High (project management industry)	Moderate	Included in package
IASSC	Standardized Exam	Proctored Exam	No	High (global)	Moderate	Third Party Training Only
ASQ	Real-world Application	Proctored Exam	Yes (higher levels)	High (global, quality)	Higher	Optional
CSSC	Accessibility	Online Exam	No	Moderate (growing)	Low/Free	Low-cost/self-paced
LSSI	Practical Application	Knowledge + Project	Yes	Moderate (practical)	Moderate	Required
MSI	Accessibility	Online Exam	No	Moderate (affordable)	Low	Included in package

 Key Considerations When Choosing a Certifying Body

• Recognition: Organizations like ASQ and IASSC are better for global recognition and career advancement.

• Budget: Organizations like CSSC and MSI are cost-effective, especially for self-paced learners.

• Practical vs. Knowledge Focus: Organizations like LSSI and corporate trainers like PM-ProLearn emphasize hands-on experience, while organizations like IASSC focus on theoretical knowledge.

• Project Requirement: Organizations like ASQ and LSSI require project completion for higher belts, which is valuable for real-world credibility.

Your choice should align with your career goals, budget, and the level of practical experience you want to gain.  Companies like PM-ProLearn provide training that prepares you for not only their LSSPM Certification Exam but also for the IASSC and ASQ exams.