SCM APO PPDS: Object dependencies
Tags:
Object dependencies :
Object dependencies are used to do the following.
a) Describe the interdependencies between characteristics and characteristic values
b) Control which components are selected from a bill of material (BOM) and which operations are selected from a task list
c) Change the values of fields in BOM items and operations during configuration
Dependency Types:
The SAP System supports the following types of dependencies:
a) Preconditions
b) Selection conditions
c) Procedures
a) Preconditions
Preconditions are to hide characteristics and characteristic values that are not allowed and thereby ensure that the configuration of an object is consistent.
You can allocate preconditions to the following objects:
A characteristic that you want to hide
A characteristic value that you want to hide
b) Selection conditions
Selection conditions ensure that all the objects relevant to a variant are selected:
Selection conditions determine which variants require a specific component or operation
Selection conditions determine when it is mandatory to assign a value to a characteristic
You can allocate selection conditions to the following objects:
Characteristics
BOM items
Operations in task lists
Sub-operations
Sequences of operations
Production resources/tools
c) Procedures
Procedures are used to infer values for characteristics – they are like actions in this respect
Procedures can be assigned to the following objects:
i. The characteristic value that triggers the procedure
ii. The characteristic that triggers the procedure
iii. The configuration profile of the configurable object