Trying to replace one soup can in the middle of a display can lead to disaster. If you decide to change the display’s configuration you may have to unstack can by can – starting at the top to avoid destroying the whole. A supply chain isn’t a simple stack of cans. A supply chain is a dynamic system that has to keep functioning while you change it. Improving a supply chain is less like rearranging a display and more like changing a truck tire while speeding down a twisty road at night while talking on your cell phone. Except the supply chain isn’t something simple like a piece of machinery. It’s filled with messy things called people. Before you set out to change a supply chain you need a play book, a plan of attack. Continuous Improvement is the business transformation management practice every leader needs to master.