KPMG has the best model of certification with the best quality of teachings and assistance. The Certified Six Sigma Green Belt is a professional who can explain Six Sigma philosophies and principles, including supporting systems and tools. A Green Belt should demonstrate team leadership, understand team dynamics, and assign team member roles and responsibilities. Black belts have a thorough understanding of all aspects of the define, measure, analyze, improve and control (DMAIC) model in accordance with Six Sigma principles. They have basic knowledge of lean enterprise concepts, are able to identify non-value-added elements and activities, and are able to use specific tools. Green Belts have a thorough understanding of all aspects of the DMAIC model in accordance with Six Sigma principles.