Availability Check for Customer Requirements 
Process Flow
An availability check is automatically run when saving customer requirements for all planning strategies. If the customer requirements cannot be delivered completely or partially, the Customer requirements: Availability Control screen appears.
One-time delivery on the requested delivery date
The system checks whether the requested delivery date can be met. If stock of a material is available to make a delivery on the requested delivery date, the stock quantity is confirmed. If there is no stock, the confirmed quantity zero is displayed.
To copy this data into the sales document, select Edit ® One-time delivery.
Complete delivery
The system checks whether there is sufficient stock for full delivery at a later date.
If the availability check is run taking the replenishment lead time into account, the date proposed is the end date of the replenishment lead time. If the system runs the availability check without taking the replenishment lead time into account, the system uses the stock and the planned inward movement of stock in the calculation.
To copy this data to the sales document, select Edit ® Complete.
Delivery proposal
The system checks whether partial deliveries can be made, and on which dates they can be made. Partial deliveries are displayed for different dates. These dates are based on the planned inward and outward movements of stock. During an availability check which takes replenishment lead time into account, the end date of the replenishment lead time is displayed if no partial deliveries can be made before the end of the replenishment lead time due to insufficient stock quantities. During an availability check, which does not take replenishment lead time into account, the system displays the dates on which partial deliveries can be made with the available stock.
To copy this proposal to the sales document, select Edit ® Delivery proposal.
When you select one of the proposals, the system displays the scheduling screen where the dates and quantities are copied.

The dates displayed in the Complete delivery and Delivery proposal sections are determined by forward scheduling from the material availability date. They represent the actual delivery dates.