4.1 Inventory Functionality Key points: geographical specialization; decoupling; balancing supply and demand; buffering uncertainty Difficult points: four prime functions of inventory Requirements: By the end of this lesson, you should be able to describe the ideal situation from an inventory perspective. understand four prime functions of inventoryKey points: geographical specialization; decoupling; balancing supply and demand; buffering uncertainty Difficult points: four prime functions of inventory Requirements: By the end of this lesson, you should be able to describe the ideal situation from an inventory perspective. understand four prime functions of inventory. 4.1 Inventory Functionality