I have over the last couple of years been asking people: What is the difference, or what is similar between Lean and Six Sigma, and what the heck is LSS???

The best answer so far that I have heard is Lean is a flow perspective and Six Sigma is a variation perspective.  The tools in Lean can be used in Six Sigma, but it seems that Six Sigma is more useful for larger, more complicated projects whereas the tools for Lean are a bit more basic.

Not sure if that definition or distinction is correct, but seems reasonable.

Russ