What is ATP and Usable in OXM?

 Please find the clarification below:

• ATP (Available to Promise):
  Refers to the quantity of stock currently available and not yet allocated to any existing orders. It represents what can still be committed to new customer orders.
  
  
• Usable Quantity:
  Refers to the physical stock that is available and in good condition for order processing (i.e., not damaged, quarantined, or reserved). This figure also includes stock that has already been committed to orders and is in processing within the warehouse.

When to refer to each:

• Use Usable Quantity to understand the actual physical stock available in the warehouse, including stock already committed or being processed.
• Use ATP when you need to know what stock can still be allocated to new customer orders after considering existing commitments.

Example:
If you have 100 units in the warehouse (usable), and 60 units are already committed to existing orders, then:

• Usable Quantity = 100
• ATP = 40 (available to promise for new orders)

In short:

• Usable Quantity = physically available stock (including committed/processing).
• ATP = stock available to sell or promise after allocation.