black belt Team leaders responsible for completion of Six Sigma projects. Black belts receive at least four weeks of training and are usually assigned to Six Sigma full time for two or more years. Although their departments and supervisors remain the same, their compensation may be tied to the success of the improvement projects they manage. In general, black belt candidates are selected because of their leadership and communication skills, but selection also can be driven by project specifications. Most importantly, they need to be change agents.