I am looking for a very resourceful case study which would include changes the company has made in order to improve itself. I am trying to focus on Engineering Companies which design, manufacture and upgrade renewable energy related components such as turbines and solar panels. Websites of any Engineering related case studies will surely give me some idea of where to look. Prehaps there are websites full of these as I'm sure it would be a very beneficial resource and would be shocked if there is not piles of knowledge neatly organized some where. Hope someone can help, Thank You.