The Six Sigma Certification acts as a validation of your knowledge and expertise in a well-designed set of techniques and tools meant to improve business processes that exist in an organization. Professionals who are skilled in identifying errors, defects, and risks in a company process and resolving them are validated using this certification. The Six Sigma Certification comprises several levels in the form of the belt classification method that is used in karate training. Professionals with a certain level of experience can take this certification to prove their proficiency. It generally takes between one and three months to complete it.