Refers to the status of inventory as it relates to its ability to be sold or consumed. Availability calculations are used to determine this status. Availability calculations vary from system to system but basically subtract any current allocations of holds on inventory from the current on-hand balance. An example of an availability calculation would be: [Quantity Available] = [Quantity On Hand] -[ Quantity On Hold] - [Quantity Allocated To Sales Orders] - [Quantity Allocated to Production Orders].