Six Sigma+Lean Toolset - Alexander John, Renata Meran, Olin Roenpage, Christian Staudter ; edited by Stephan Lunau; John, Alexander; Lunau, Stephan; edited by Stephan Lunau; Meran, Renata; Roenpage, Olin; Schmitz, Astrid; Staudter, Christian (Springer Berlin Heidelberg, 2008)