Six Sigma is a set of management methods, mainly emphasizing the elimination of errors, reducing waste has avoided labor.
Means: improve quality.
Objective: Make customer satisfaction and increase profits.
Six Sigma is the definition document, Measure where you are, what is the status start, improved (IMPROVE), control (Control) new process - this is DMAIC. DMAIC can also be interpreted as "Dump Manager Ignore Customers"
Black Belt: Find out the biggest problems that have the greatest improvement, and bring the biggest saving and satisfying the customer, then appoint a person to be responsible for the project. Usually this person will be a middle management person, he is a black belt.
Different from other management methods, when using other management methods, each person should go to the project in its idle time, but the black belt has only one job, that is, the project to give him. And he also got the help group he needs from the "person in charge" (his supervisor) and the green belt (his lower level).
