Requirements class

The requirements class belongs to the general control elements in the ERP system. Among other things, it is defined in the requirements class if an ATP check should be carried out and requirements transferred for a material in sales and distribution documents. In SAP APO, the requirements class corresponds to the check mode. The requirements class to which a requirements type is assigned, can be determined via a strategy group in the material master, for example.

For more information, see SAP Library for SAP ECC Central Component under Determining the Requirements Type .

Check rule

The check rule is specified by the SD application. When the sales order is created, the value A is always transferred to SAP APO. When a sales order is created with make-to-order production, AE is always transferred. In SAP APO, the checking rule corresponds to the business event.

Check instructions for the ATP check of the finished product

The check mode in which you have set the multilevel ATP check, ensures that a multilevel ATP check is triggered when production is called. The check instructions for the ATP check of the finished product are determined using the check mode and the business event.

The check method to be checked, and the start and time of production are configured in the check instructions for the ATP check of the finished product. If the component requirements have been generated through a plan explosion, an ATP check is performed for the components.

A conversion mode must be set in the check instructions. The conversion mode must also be set in the check instructions for the ATP check of a substitution that results from a rules-based ATP check and for which you want a multilevel ATP check to be carried out.

You must also define in the check instructions for the ATP check at finished product level if a remaining requirement should be generated for the associated components.

Check instructions for the ATP check of the component

The check instructions for the ATP check of a component are determined in a similar way as for the finished product, the difference being that the values of the check mode and the business event are not transferred from the ERP system. The value for the check mode is read from the location-specific product master. If one is not entered there, an error message is issued during the ATP check. The value for the business event for the ATP check of the component is adopted from the business event for the ATP check of the finished product. However, you have the option to enter an additional specific business event for the ATP check of a component in the check instructions for the ATP check of the finished product. This particular business event, together with the check mode in the location-specific product master of the component, determines the individual check instructions.

The conversion mode is not relevant to the check instructions of the ATP check of the component or for the substitution of a component. However, in the check instructions for the components, if they are also header materials, you must define how the remaining requirement should be created for associated components.

Check control for the ATP check of the finished product

The check control and the scope of check for the ATP check of the finished product is determined using the business event and the ATP group. The ATP group is read from the location-specific product master of the finished product.

Check control for the ATP check of the component

The check control and the scope of check for the ATP check of the component are determined using the business event for the component (if it is not available, the business event of the finished product is used) and the ATP group. The ATP group is read from the location-specific product master of the component.