These materials were developed as part of MIT's ESD.60 course on "Lean/Six Sigma Systems." In some cases, the materials were produced by the leadinstructor, Joel Cutcher-Gershenfeld, and in some cases by student teams working with LFM alumni/ae. Where the materials were developed by student teams, additional nputs from the faculty and from the technical instructor, Chris Musso, are reflected in some of the text or in an appendix.