Lean Six Sigma is a set of process improvement tools that applies a disciplined, data-driven approach and methodology for eliminating defects (driving toward six standard deviations between the mean and the nearest specification limit) in any process – from manufacturing to transactional and from product to service. DVIRC offers progressive 6 Sigma training and education with a progressive sophistication of tools and skills—Yellow Belt, Green Belt and Black Belt.
Lean Six Sigma (LSS) combines two proven improvement methodologies – Lean and Six Sigma – into one package to achieve business results greater than either one could generate separately. Developed by the Toyota Corporation, Lean focuses on eliminating wastes that impede process flow, and is a process improvement methodology that has spread into numerous industries beyond manufacturing.  Lean tends to use the Plan - Do - Check - Act (PDCA) approach to process improvement
Six Sigma follows the ‘DMAIC’ philosophy of Define – Measure – Analyze – Improve – Control. This approach ensures that improvement efforts are focused and targeted at specific issues. Understanding the relationship of the inputs and outputs using data-based statistical tools is a key feature of Six Sigma.DMAIC is also a great way to approach any project methodically, whether it is a 'Six Sigma' project or not.
Six Sigma focuses on reducing variation in any process, using statistical tools to make sense of and use data generated in a business for quantifiable and typically substantial improvements. Very often Lean tools are used in the ‘Improve’ Phase of a Six Sigma project to implement the findings developed in the ‘Analyze’ Phase.