A highly revered ex-Toyota consultant stated that most manufacturers seem focused on achieving a 35 to 40 percent productivity gain over three to five years as a measure of success in their current Lean efforts. He went on to say that manufacturers should actually be focused on a 400 percent improvement in productivity over 10 years to achieve the path to becoming Lean. But why is there such a large disparity in measuring succes – See more at: http://leanconstructionblog.com/6-Tips-On-How-To-Implement-A-Lean-Office-in-the-AEC-Industry.html#sthash.fI0sY9oo.dpuf