Lean Six Sigma implementation has been expanded into diverse industry sectors for a variety of objectives. Recently, the application of Lean Six Sigma into improving environmental performance is noted by practitioners, even though there is very few or no academic literature discussing the implementation. This generates the new research opportunities for academia. Thereby, the research is born to fill out the gap between academic study and industrial practice, and to encourage the execution through pragmatic experience and theoretical analysis. The overall aim of this study is to explore the...