The Six Sigma approach is based on the mathematical notion of standard deviation, which is a statistic that shows how tightly all the examples in a set of data are bunched around the average. When they are so close to each other that the bell curve is steep, then the standard deviation is small. Six Sigma states there are six standard deviations between the average and the specification limit, so practically all the items will meet parameters Six Sigma Green Belt Training.
A company can get these results (such as cost reduction or profit increase) by using specific quality management methods and creating a special infrastructure of people inside the organization to follow a defined sequence of steps; the employees who are part of that special infrastructure and who drive the improvement or change efforts are the ones who attend training to be certified in Six Sigma.
Large organizations find this concept appealing due to the infrastructure required to undertake and drive various process steps. They can provide the required staff. There are two primary certifications offered to drive these process improvements: Green Belt and Black Belt.
Green Belt training is the main entry level option. This person learns basic concepts and tools while also working with a Black Belt who acts as a mentor. To qualify for Green Belt training, one needs three years of work experience and must have contributed to at least one project regarding process improvement. The instruction is typically a two week intensive session that covers a specific project to be undertaken upon returning to work. While working on the project, the trainee learns and starts to apply tools such as process mapping, graphical analysis, and measurement systems. Once the course is completed and the project reviewed, the trainee is tested on core concepts to receive certification.
Black Belts are highly experienced with process tools. Qualifications for becoming a certified Six Sigma Black Belt include prior experiences with process improvements, so first earning a Green Belt is unnecessary. These trainees need three years of experience working with process improvement, and must have completed two full process improvement projects as well as be confident managing a team. The trainee learns about Six Sigma role responsibilities, overcoming roadblocks, and understanding performance measures. A Black Belt class lasts approximately four weeks. Afterwards, an exam is required to achieve certification.
Lean Sigma is a related training opportunity that focuses on every aspect of business. However, Green and Black Belt certification programs deal more specifically with manufacturing processes. Depending on individual needs of the company and/or trainee, one course type may be more relevant than another. There are even industry-specific options, such as a Green Belt program for the healthcare field