LSS (Lean Six Sigma)

It generally refers to the blending of both Lean and Six Sigma into a single approach toward resolving business problems. Lean and Six Sigma can be thought of as two sides of the same coin; that is, they have the same general purpose of improving business operations but approach it from different, yet complementary perspectives. 
Related StatStuff Video: 
   -Section 1-Introduction, Lesson #2 - Introduction to Lean and Six Sigma