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Six Sigma Roles And Responsibilities
The Lean Six Sigma system includes defined roles to help structure the improvement effort. The key roles include:
Black Belts (BB's), who are usually involved full time on Lean Six Sigma (LSS) projects. The role of the BB includes leading improvement effort, coaching others in the application of Lean Six Sigma, ensuring that best practices are leveraged throughout the organization. BB's are also expected to find opportunities for improvement projects, and act as technical experts on the LSS tools and methods.
Green Belts (GB's), are expected to support BB's in LSS projects. They work part time alongside their regular jobs– typically devoting 10 to 20% of their time to their projects. A GB project is typically smaller in scale and less complex than a BB project, and will be linked to the GB's area of expertise or involvement.
Champions, lead the LSS programme, and identify, prioritize and launch improvement projects. They will select, manage and ensure thorough training for BB's, and ensure that best practices are shared throughout the organization. They should also communicate and publicize the results of the Six Sigma programme, ensure that projects are cross functional, and work with other stakeholders to ensure that their objectives are not compromised and that organizational barriers are removed.
Master Black Belts (MBB's), are technical experts in the application of statistical and other tools, and are responsible for developing and delivering training to others. MBB's will assist BB's with difficult more complex projects and analyses, and participates in the identification of projects and their review. They will lead major improvement projects.
Yellow Belts (YB's), who undertake projects with the discipline and rigour of Lean Six Sigma, but in circumstances where the scale and nature of the projects does not require the complex statistical analyses usually associated with Lean Six Sigma projects. Yellow belts are ideally placed to assist Black and Green Belts with their larger more complex projects.
Lean Six Sigma Training
Within a Lean Six Sigma programme, each of the roles has specific training provided to help develop the necessary competences. Different providers have slight variations in their training curricula, and hence different lengths of training time, but typically the training follows the patterns below:
ROLE |
TRAINING |
Black Belt |
16-20 days of training delivered one week per month over 4 months. This format is to enable the Belt to carry out a project as part of the training programme. Black Belt training is intensive and in depth. |
Green Belt |
8-12 days of training delivered over 4 months. Traditionally delivered over 2 months, but more and more delivered in the same manner as Black Belt training by serious training providers. |
Champions |
2-3 days of training that covers the business case for Lean Six Sigma, deployment within the organisation, how to select projects, and manage the Belts within the organisation. |
Master Black Belts |
An additional 2 weeks of training over and above Black Belt. The training goes into more detail on deployment, and both hard and soft skills. |
Yellow Belts |
4-5 days of training giving all the details of the DMAIC methodology, without the more advanced statistics found at Green and Black Belt level. |
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