3) How Complex is Apple's Supply Chain?
Some people in blogosphere said that Apple Supply Chain is not that complicated. So this section will explain some characteristics of Apple Supply Chain through various metrics and compare them with Amazon Supply Chain.
Inventory Turnover
Inventory Turnover is a traditional financial measure to determine how efficient company uses its financial resources to create sales, the higher number is the better. Supply chain professionals also use this metric in inventory management function. Generally accepted calculation is [Cost of Goods Sold / Average Inventory]