Wal-Mart has fallen behind the likes of Amazon when it comes to delivering online orders, so the retail giant is working with Deloitte & Touche consultants to build a new logistics system that sends items directly from retail stores, rather than from strategically placed warehouses. The e-commerce and retail businesses at Wal-Mart have been in silos, with one former executive saying that e-sales were nothing more than "a rounding error in the U.S. market."

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