If you change the receipt quantity of an in-house production order with interchangeable components in interactive production planning in SAP APO, the system is able to reexplode the order or adjust the component quantities. Substitutions already contained in the order are possibly lost during a reexplosion. When making this adjustment, the system takes the demands of product interchangeability (InC) into consideration.
You cannot manually change a product substitution order.
You can change an in-house production order in SAP APO if the in-house production order has not yet been released.
If the status of the in-house production order allows a reexplosion and you want a reexplosion to take place, the system reexplodes the order. The system automatically adopts the components into the order that are required in the plan of the in-house production source of supply. The system does not take account of product interchangeability (InC) during the plan explosion.
Note
A reexplosion is not possible if an in-house production order has one of the following statuses:
Firmed input
Fixed date
Released
Started, partially confirmed, or finally confirmed
Partially delivered or finally delivered
If the order contained product substitutions, these are lost during the reexplosion. If an order created in the planning run did not yet contain any product substitutions, the substitutions were only mapped using product substitution orders until now. The system does not adjust the product substitution orders immediately, but adjusts them in the next MRP planning run to the changed dependent requirement quantities.
If a reexplosion is neither permitted nor desired, the system automatically adjusts the dependent requirement quantities for an in-house production order.
In the case of an order that does not yet contain any substitute components , the system changes the component quantities proportionally, in other words by the same factor you used to change the receipt quantity. For example, if you halve the receipt quantity, the system also halves the quantities of all components.
However, the proportional adjustment only applies to the total quantity of these components in the case of an order that, instead of one component, contains several successive components from the supersession chain. The system has to consider the following here:
That surplus stock of a discontinued component has to be consumed first
That discontinued products can no longer be procured
If you reduce the receipt quantity of an in-house production order, the system first reduces the quantity of the most current (that is, the last) component from the segment of the supersession chain that has been adopted into the order. If the quantity of this component is smaller than the quantity by which the total quantity has to be reduced, the system reduces the quantity of the predecessor component, and so on. If you increase the receipt quantity of an in-house production order, the system only increases the quantity of the last component.
If you change the receipt quantity of an in-house production order with interchangeable components, you also thus indirectly change the dependent requirements of the order. To adjust the planning to the changed requirements situation, you have to execute an MRP run. To update the components of the in-house production order according to the supersession chain, you perform an ATP check in SAP APO.