Getting a Functional Overview of aATP

The basic concept of the check based on the ATP quantity is summarized as follows: Incoming customer and component requirements are checked against the "cumulated ATP quantity" for the requirement date. If the cumulated ATP quantity for the requirement date is sufficient, the requirement can be confirmed. At the same time, the requirement reduces the cumulated ATP quantity. The quantity is therefore "reserved" for the requirement and is not available for other requirements.

You can use the Customizing settings to specify the stocks and stock changes that are taken into account when the ATP quantity is calculated and availability checked.

If the availability check for the order is successful, the system confirms the required material and quantity for the required date. In this case, the user does not notice the availability check. The result is a confirmed schedule line in the sales order. If the availability check is unsuccessful, the system response depends on the Customizing settings. The system can branch to the Availability Control screen or automatically select the delivery proposal specified in the Customizing settings for Availability Check Default Values.

On the Availability Control screen, the system informs the user of the quantities that can be confirmed as required and those that cannot be confirmed as required, and if possible, proposes an alternative delivery.

In the Avail. Check Rule field, you can activate or deactivate the Availability Control screen for sales document processing. If the screen is deactivated, the end user cannot manually select a delivery proposal if the availability check is insufficient. Therefore, Customizing settings must be configured to specify how the system is to respond. Is the system to select one-time delivery,complete delivery, or delivery proposal automatically in the background?

If the Availability Control screen is active, you still have to define how the system responds if the availability check is insufficient for functions that run in the background and that check availability (for example, rescheduling).

You can also control whether the Fix Qty/Date parameter on the Availability Control screen is selected by default.

The following partial delivery agreements are possible at item level:

• _: Partial delivery allowed

• A: Create a delivery with quantity greater than zero

• B: Create only one delivery (also with quantity = 0)

• C: Only complete delivery allowed

• D: No limit to subsequent deliveries

The Complete delivery at header level and Partial delivery at item level indicators can be changed manually when you process sales documents.

Declarations about the availability situation can be made only on the basis of the ATP quantity. Transaction CO09, Availability Overview, can be used for this. The stock/requirements list (transaction MD04) and the stock overview (transaction MMBE) cannot be used for declarations about availability. If they are used, the availability situation is often misinterpreted.