The list author says: "These books offer a starting point for creating true iterative marketing cycles based on not only Lean principles but more importantly Customer Value. It is not about being in a cozy facility or going to Gemba on the factory floor. It is about starting with collaboration with your customer and not ending there. It is about creating Sales Teams that are made up of different departments not other sales people. It is about using PDCA (Plan-Do-Check-Act) through-out the marketing cycle with constant feedback from customers that can only occur if they are part of the process. It is about creating value in your marketing that a customer needs to enable him to make a better decision."