Have to disagree with EC & R2D2 here. Although "Lean" and "Six Sigma" are different, (clearly, they are spelt and pronounced differently...) they are complementary and most people find it better to be trained in both simultaneously rather than each in isolation.More service environments suit a combination of the two, with Lean more prolific at the start of the programme, (and more at the heart of the philosophy if you want to bring that part in) and Six Sigma being used alongside in instances where a more rigorous statistical approach is suitable. As CBB points out there is an obvious overlap that helps the two to fit together.It doesn't mean people don't understand either Lean or Six Sigma, it just happens that the two work together well to form if you like a "new" terminology, Lean Six Sigma.Also, there are plenty of experts in LSS for Services, just no universally agreed approach. It's not an exact science. Some of these guys do come from Manufacturing backgrounds originally (like John Bicheno and the Cardiff Uni lot, who I do agree run the best course of it's type).