Much more important, these simple maps - often drawn on scrap paper - showed where steps could be eliminated, flows smoothed, and pull systems introduced in order to create a truly lean value stream for each product family. In 1998 John teamed with Mike Rother of the University of Michigan to write down Toyota's mapping methodology for the first time in Learning to See. This simple tool makes it possible for you to see through the clutter of a complex plant. You'll soon be able to identify all of the processing steps along the path from raw materials to finished goods for each product and all of the information flows going back from the customer through the plant and upstream to suppliers. Source: Publisher