In today's rapidly changing market, companies are increasingly competing on the efficiency, effectiveness and agility of their supply chains. Much has been written about the agility of Apple's supply chain - a recent article in The New York Times highlighted this when they described how Apple switched from plastic to glass screen six weeks before the launch - and in that time-frame they had to find a new supplier, perfect the fabrication of samples, and get to production-level volume. In a recent Gartner survey Apple was at the top of the list in key metrics, including inventory turns (Samsung's inventory turn was 17.1, while Apple's was 74.1).