ICBB, IASSC Certified Lean Six Sigma Black Belt, is an expert professional with extensive Lean Six Sigma methodology knowledge. They take charge of complex improvement projects, usually working full-time. A Lean Six Sigma Black Belt has a deep knowledge of all aspects of the Lean Six Sigma methodologies, including a high level of skill in the topics covered in the Measure, Analyze, Improve, and Control (DMAIC) phases, as outlined in the IASSC Lean Six Sigma Black Belt Body of Knowledge.