Inventory Management, Function of Inventory, Inventory Cost, Item Costs, Holding Costs, Ordering Costs, Shortage Costs, Inventory Control System, ABC Classification, VED Analysis, FSN Analysis, HML Classification, SDE Classification, Inventory System, Buffer Stock, Safety Stock, Lead Time, Annual Usage Value, Reorder Point, Economic Order Quantity, EOQ, Multi - Period Inventory Model, fixed–order quantity model, fixed–time period model, Single - Period Inventory Model, Material Requirements Planning, Manufacturing Resource Planning