Inventory Definitions
On Hand/In Stock:
Number of items physically in the warehouse.
On Order:
Number of units currently on purchase orders, but not yet received into the warehouse.
Committed:
Number of units reserved for open orders, but not yet taken out of stock.
Available:
Number of units physically in stock minus the number of units that are reserved for open orders (On Hand - Committed). This is the quantity that is left still to sell.