I had never seen what a supply chain looked like in action until I visited Wal-Mart headquarters in Bentonville, Arkansas. My Wal-Mart hosts took me over to the 1.2-million-square-foot distribution center, where we climbed up to a viewing perch and watched the show. On one side of the building, scores of white Wal-Mart trailer trucks were dropping off boxes of merchandise from thousands of different suppliers. Boxes large and small were fed up a conveyor belt at each loading dock. These little conveyor belts fed into a bigger belt, like streams feeding into a powerful river. Twenty-four hours a day, seven days a week, the suppliers' trucks feed the twelve miles of conveyor streams, and the conveyor streams feed into a huge Wal-Mart river of boxed products. But that is just half the show. As the Wal-Mart river flows along, an electric eye reads the bar codes on each box on its way to the other side of the building. There, the river parts again into a hundred streams. Electric arms from each stream reach out and guide the boxes-ordered by particular Wal-Mart stores– off the main river and down its stream, where another conveyor belt sweeps them into a waiting Wal-Mart truck, which will rush these particular products onto the shelves of a particular Wal-Mart store somewhere in the country. There, a consumer will lift one of these products off the shelf, and the cashier will scan it in, and the moment that happens, a signal will be generated. That signal will go out across the Wal-Mart network to the supplier of that product-whether that supplier's factory is in coastal China or coastal Maine. That signal will pop up on the supplier's computer screen and prompt him to make another of that item and ship it via the Wal-Mart supply chain, and the whole cycle will start anew. So no sooner does your arm lift a product off the local Wal-Mart's shelf and onto the checkout counter than another mechanical arm starts making another one somewhere in the world. Call it “the Wal-Mart Symphony” in multiple movements-with no finale. It just plays over and over 24/7/365: delivery, sorting, packing, distribution, buying, manufacturing, reordering, delivery, sorting, packing...
Just one company, Hewlett-Packard, will sell four hundred thousand computers through the four thousand Wal-Mart stores worldwide in one day during the Christmas season, which will require HP to adjust its supply chain, to make sure that all of its standards interface with Wal-Mart's, so that these computers flow smoothly into the Wal-Mart river, into the Wal-Mart streams, into the Wal-Mart stores.
Wal-Mart's ability to bring off this symphony on a global scale-moving 2.3 billion general merchandise cartons a year down its supply chain into its stores-has made it the most important example of the next great flat-tener I want to discuss, which I call supply-chaining. Supply-chaining is a method of collaborating horizontally-among suppliers, retailers, and customers-to create value. Supply-chaining is both enabled by the flattening of the world and a hugely important flattener itself, because the more these supply chains grow and proliferate, the more they force the adoption of common standards between companies (so that every link of every supply chain can interface with the next), the more they eliminate points of friction at borders, the more the efficiencies of one company get adopted by the others, and the more they encourage global collaboration.