Consumption by Special Orders 
Use
You use this function to enable special orders such as third-party order (TPO), make-to-order (MTO) and purchase-to-order (PTO) sales orders to consume normal planned independent requirements (PIRs). Normal PIRs include all versions except 97, 98, and 99. You can maintain normal PIRs which represent your purchasing limit or total sales quantities (irrespective of order type).
Prerequisites
● You have activated the Consume PIR indicator in Customizing, by choosing Sales and Distribution ® Sales ® Sales Documents ® Sales Document Item ® Maintain Item Categories for AFS. This enables TPO/MTO/PTO sales order items to consume normal PIRs.
● You have implemented the method CONSIDER_THIRDPARTY (consider third-party items from purchasing) of the BAdI MD_CHANGE_MRP_DATA to select third party stocks. This is needed for PIR consumption by TPOs, and not for PIR consumption by MTOs/PTOs.
Features
● TPO orders can consume normal PIRs and TPO PIRs (version 98). You can activate and deactivate this function by using the Consume PIR Customizing indicator at the sales order item category level.
● MTO/PTO orders can consume normal PIRs and MTO PIRs (version 97). You can activate and deactivate this function by using the Consume PIR Customizing indicator at the sales order item category level.
● Normal sales orders (make-to-stock) can consume normal PIRs only. You can activate and deactivate this function by using the Independent Requirements Reduction indicator in Customizing for requirement classes by choosing Sales and Distribution ® Basic Functions ® Availability Check and Transfer of Requirements ® Transfer of Requirements ® Define Requirements Classes.
● The details of PIR consumption by TPO/MTO/PTO orders will be displayed on the Consumed Planned Requirements tab page of the AFS Stock Requirements List and the AFS MRP List.
● If the material is valid for more than one order type (TPO/PTO/MTO/Normal), the consumption details on the Consumed Planned Requirements tab page are grouped according to the order type in the Grouped By column.
For PIR consumption by TPO, the system dynamically calculates the TPO order quantity to be used for consumption by reading the TPO purchase requisitions and purchase orders, and not by reading the TPO sales order.
● The reduction of the PIRs happens after goods movement. For normal, MTO and PTO orders, PIR reduction happens after goods issue for the sales order. For TPO, PIR reduction happens after the statistical goods receipt of the TPO purchase order.
If you are using PIR consumption by TPO, it is mandatory to execute the statistical goods receipt for the TPO purchase order to ensure that PIR reduction also takes place.
● After PIR Reduction:
○ The withdrawal quantity is increased and the planned quantity is decreased in the PIR maintenance transaction (J3A1).
○ You cannot see the entries on the Consumed Planned Requirements tab page of the AFS Stock Requirements List/AFS MRP List.
● TPO and MTO consumption of PIRs do not have higher priority over normal PIR consumption. That is, all PIRs valid for a particular sales order requirement are sorted according to date and then consumed. This is also true for PIR reduction.
Activities
● After creating a TPO, MTO, or PTO sales order, view the PIR consumption details on the Consumed Planned Requirements tab page of the AFS Stock Requirements List and AFS MRP List.
● To view the PIR reduction details, from the SAP Easy Access screen, choose Logistics ® Production ® Production Planning ® Demand Management ® AFS Planned Independent Requirements ® Maintain.
Limitations
● Consumption of PIR by TPO orders is not supported in ATP against Planning.
● Consumption of PIR by TPO/MTO/PTO orders is not supported for non-AFS materials.
● PIR consumption by TPOs cannot be handled in AFS-SCM integration. This is because TPO orders will not be transferred to the SAP SCM system for planning.