Backwards scheduling for a planned order begins with the material requirement date and calculates backwards to determine the order start and opening dates. The system first subtracts the goods receipt processing time from the requirement date to find the production finish date. Next, the in-house production time is subtracted to calculate the production start date. Finally, the opening period, defined in the scheduling margin key, is subtracted from the production start date to determine the date by which the planned order must be converted, which is the planned opening date. These three elements are fundamental to this calculation.

C. Quality inspection time: This is not a distinct, top-level scheduling element. It is typically included as part of the goods receipt processing time or as a specific operation within the routing (part of in-house production time).

D. Goods issue processing time: This time is relevant for the staging and availability of components required for the production order, not for scheduling the planned order of the finished product itself.

1. SAP Help Portal

SAP S/4HANA

"Scheduling for In-house Production": This document outlines the scheduling process for materials produced in-house. It explicitly states: "The system subtracts the goods receipt processing time from the order finish date to determine the production finish date... The system subtracts the in-house production time from the production finish date to determine the production start date." This confirms options A and E.

(Reference: SAP S/4HANA -> Product Assistance -> Enterprise Business Functions -> Manufacturing -> Production Planning and Control (PP) -> Material Requirements Planning (PP-MRP) -> MRP Calculation -> Scheduling -> Scheduling for In-house Production)

2. SAP Help Portal

SAP S/4HANA

"Scheduling Margin Key": This documentation details the components of the scheduling margin key

which is used in scheduling calculations. It specifies that the "Opening period" is used to calculate the opening date of the planned order by subtracting it from the order start date. This confirms option B.

(Reference: SAP S/4HANA -> Product Assistance -> Enterprise Business Functions -> Manufacturing -> Production Planning and Control (PP) -> Basic Data (PP-BD) -> Material Master (PP-BD-MM) -> Scheduling Margin Key)

3. SAP Help Portal

SAP S/4HANA

"Material Master Data for MRP": The documentation for the Material Master

specifically the MRP 2 view

describes the purpose of the "In-house production time" and "GR (Goods Receipt) processing time" fields as direct inputs for production scheduling.

(Reference: SAP S/4HANA -> Product Assistance -> Enterprise Business Functions -> Manufacturing -> Production Planning and Control (PP) -> Material Requirements Planning (PP-MRP) -> Master Data for MRP -> Material Master Data for MRP)