Dependencies in Production Data Structures
(PDS)
Use
You can use object dependencies in production data structures. You can derive values for characteristics using object dependencies. You assign the object dependency to BOMs or routings in the ERP system, which is then transferred to SAP APO.
Prerequisites
If you have assigned a dependency to an operation in a routing in the ERP system, the dependency is assigned to a mode in SAP APO by default.
You must assign specific dependency groups to the object dependency in the ERP system in order to use the object dependency at activities and operations in SAP APO.
· The object dependency is only evaluated at the operation in SAP APO if you have assigned the dependency group SAPAPOOPR.
· The object dependency is only evaluated at the activity in SAP APO if you have assigned the dependency group SAPAPOACT.
Proceed as follows:
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1. Create the object dependency group in the ERP system in Customizing under Logistics - General → Variant Configuration → Dependencies → Maintain Groups.
2. Call up the relationship in the ERP system under Logistics → Central Functions → Variant Configuration → Dependency → Single Dependency.
Specify the dependency group on the basic data.
Features
You can also derive or change the value for the characteristics of the components using dependencies (procedures). You must have maintained dependencies at the BOMs or routings in the ERP system (see Inferring a Characteristic Value with Procedures (Example)).
You can also carry out more complex operations (such as calculations) using procedures:
· Dependency Syntax: General Rules
· Entering Characteristics and Characteristic Values
You can also use user-specific functions within procedures to derive or change values (see User-Defined Functions).
The material BOM is exploded on a single level for CDP. You cannot refer to materials in subordinate BOMS in a multilevel BOM structure in the object dependency.
If you wish to use user-defined functions, note the following:
· The function definition and the function module must be created in the ERP system and in SAP APO when using functions.
· The system uses the function modules CUOV_GET_FUNCTION_ARGUMENT and CUOV_SET_FUNCTION_ARGUMENT for processing the generic function interface in the ERP system. These function modules are not available in SAP APO (SCM 4.0). The same function is used in SAP APO with the methods /SAPAPO/CL_CU_GEN_SERVICE (for CUOV_GET_FUNCTION_ARGUMENT) and /SAPAPO/CL_CU_GEN_SERVICE (for CUOV_SET_FUNCTION_ARGUMENT).
You can find additional information about object dependencies in the ERP system in the SAP Library under Logistics → Logistics - General → Variant Configuration