A Certified Quality Auditor is a professional who understands the standards, principles and techniques of auditing from examination, questioning, evaluation and reporting to determine the adequacy and shortcomings of the quality system.
A certified quality auditor analyzes all elements of a quality system and judges its compliance with industrial management standards, quality assessment and control systems.

The Six Sigma certified black belt is a professional who can explain the philosophies and principles of Six Sigma, Including supporting systems and tools. A black belt must demonstrate leadership and understanding of team dynamics and assign the roles and responsibilities of its members.
Black belts have a thorough understanding of all aspects of the Control Determination, Measurement, Analysis and Improvement (DMAIC) model according to Six Sigma principles.

The Six Sigma Green Belt works to support or under the supervision of the Black Six Sigma belt, It analyzes and solves quality problems and participates in quality improvement projects.
A green belt is someone who has at least three years of work experience and wants to demonstrate their knowledge of Six Sigma tools and processes

The Six Sigma Yellow Belt certification is aimed at those who are new to the Six Sigma world who have a role, interest or small need to develop basic knowledge, Yellow belts can be junior employees seeking to improve their world or their executive heroes who need an overview of Six Sigma and identify, measure, analyze, and improve the model (DMAIC).
This certification adopts strategies for developing the concept and usability of Six Sigma tools and methodologies within the organization.

Certified Supplier Quality Professional works with the supply chain and suppliers in the enterprise to continuously improve the performance of key system components (increase life cycle, and reduce scrap, and improve repair processes) through the implementation of process controls and the development of quality assurance plans.
Certified Supplier Quality Professional tracks data, and identifies improvement projects, It manages cross-functional implementation to improve the performance of key components and suppliers.