Defining the Check Instructions

You define the check instructions for the business event A (for make-to-stock production) and AE (for make-to-order production).

Starting from Customizing for the Global Available-to-Promise, choose Start of the navigation path General Settings Next navigation step Maintain Check Instructions End of the navigation path .

The following example shows how the check instructions might be set for make-to-order production, for example.

Field	Input Value	Comment
Check mode	e.g. 040	Make-to-order manufacturing
Business event	AE	SD order, make-to-order production
Product check	First step
Product allocation	No check
Forecast	No check
Start production	Availability check first, then production or Production directly
Production time	After executing all check methods
Recreate receipt elements	Set indicator	See also: Recreating Receipt Elements

If you work with a make-to-stock production strategy, you have to create the same check instructions for the business event A .

Product Check

If you entered First Step in this field, the system first executes a product check based on the ATP time series when creating a sales order. In a second step, the system executes a CTP check, during which production is then triggered.

Advantages of this procedure:

Already existing receipt elements are better used
In many cases, partial confirmations allow the confirmation of the sales order on an earlier date

Disadvantages of this procedure:

If the product check that is executed in the first step finds a receipt element that is not required completely and that lies in the future (after the customer desired date), the sales order is covered by this receipt element. The confirmation date is the availability date of the receipt element. That is, the sales order cannot be confirmed on the desired date. This is also valid even if it had been possible to use the CTP check to create a new, more suitable receipt element to cover the sales order on time.
If you work with fixed lot sizes, it is possible that receipt elements exist from earlier CTP checks that are not required completely.

The desired quantity of a newly received sales order, for example, is greater than this rest quantity. As a result the product check splits the sales order. The system creates a partial confirmation based on the rest quantity not required until now. The CTP check is only accessed for the partial quantity that cannot be covered by the already existing receipt elements. The CTP check triggers a procurement for the amount of the fixed lot size. It is possible that this new receipt element could have covered the customer requirement completely. The partial confirmations then become unnecessary. However, they can no longer be canceled.

Start Production

If you choose the setting First Availability Check, then Production , the system executes the availability check first, as described above. The CTP check is carried out for the partial quantity that cannot be confirmed and production is triggered, that is, the system creates a new receipt element.
If you choose the setting Production Directly , the system executes a net requirements calculation instead of an availability check. You can specify whether or not the system is to take existing receipt elements that have already been otherwise assigned but are suitable from the date/time viewpoint into account in the CTP check and assign them if necessary, i.e. perform a redistribution of receipt elements. See also: CTP with Production Directly