Lean is a methodology based on waste reduction, while Six Sigma is a methodology based on process improvement. Both options are being used together in many organizations, so a Lean Six Sigma approach is very popular. You may obtain a Lean Six Sigma certification by combining our Lean Flow Fundamentals with any Six Sigma Green, Black, or Master Black Belt option. You may also earn a Lean Six Sigma Yellow Belt by completing the Lean Introduction and the two day Yellow Belt. Online Lean Six Sigma options are also available and require the completion of the Lean Level III training and any online Green or Black Belt program. Lean Level II may be combined with our online Yellow Belt for a Lean Yellow Belt program.