In SAP S/4HANA, the MRP planning file (table MDVM, visible via MD05) tracks changes that trigger MRP to re-evaluate a material’s planning situation. Entries are created when:

Changing the procurement type in the product master(C): The procurement type (material master, MRP 2 view, field: Procurement Type) determines whether a material is produced in-house ("E"), procured externally ("F"), or both ("X"). Changing it (e.g., via MM02) affects how MRP generates planned orders or purchase requisitions, so an entry is added to the planning file (e.g., NETCH or NETPL indicator) to prompt recalculation.

Changing the stock in inventory management(D): Any stock change (e.g., goods receipt via MIGO, goods issue via MB1A) updates the available stock (MD04). This triggers an MRP planning file entry because it alters the net requirements calculation, requiring MRP (MD01/MD02) to reassess supply versus demand.

Changing the delivery address in transportation management(A) affects logistics execution (e.g., shipment documents), not MRP planning directly—no entry is created.Changing the storage bin in warehouse management(B) (e.g., via LT10) is a WM-level movement that doesn’t impact MRP unless stock quantity changes, which falls under (D). This is per SAP’s MRP planning file logic.