Process back orders and updates

Trigger: A backordered item becomes available in inventory or a customer requests a modification to an unfulfilled order.

1. Match newly received inventory against pending backorders
2. Allocate available stock to prioritized unfulfilled orders
3. Process modifications or cancellations to delayed orders
4. Update order status within the order management system
5. Transmit updated delivery timelines to the customer
6. Release the resolved order for physical fulfillment

Outcome: The order status is updated in the system and the previously unfulfilled order is allocated and released for delivery.