As the name implies, a Lean Six Sigma methodology combines the principles of lean manufacturing ("Lean") with those of Six Sigma. But, why would anyone want to do this? What are the advantages and disadvantages of combining Lean and Six Sigma methodologies?

Lean is a tool used by businesses to streamline manufacturing and production processes. The main emphasis of Lean is on cutting out unnecessary and wasteful step so that only the steps that directly add value to the product remain.