Since the proper implementation of Six Sigma is critical to business operations, several key roles have been identified. Six Sigma even borrowed terminologies from martial arts rankings to define the hierarchy of these job functions. These are the following:
a) Executive Leadership This consists of all top management officials or members of an organization, including CEOs. They are the ones responsible in providing resources that other role holders need to improve business processes. b) Champions They are in charge in the proper implementation of Six Sigma across the organization. They also act as one of the mentors of Black Belts. c) Master Black Belts Aside from ensuring that Six Sigma is properly deployed in various areas of the organization, they also act as the in-house experts and primarily dedicate their 100% attention to Six Sigma. d) Experts They are the ones who are visible across business divisions in which they collaborate with other employees to incorporate all the lessons that they have learned through years of experience. Their aim is to improve the products and services provided to customers, as well as redefining the processes behind any business operation. e) Black Belts They are responsible in applying the Six Sigma methodologies on various company projects and they work under the supervision of Master Black Belts. f) Green Belts They team up with Black Belts in achieving desired results on any given project, aside from doing the normal job functions given to them. g) Yellow Belts These employees have been trained with the different techniques behind Six Sigma but are not expected to actively participate in any project or quality improvement-related activities within the organization.