You purchase raw materials with a purchase order against a cost center.

Financial accounting documents are posted during the Post valuated goods receipt (D) process step when purchasing raw materials against a cost center. This step results in the recording of the goods receipt in the system, affecting inventory and financial accounts, and reflects the increase in inventory along with the corresponding financial obligations (e.g., liabilities to the supplier).

Saving a purchase order (A)creates a legal document for the procurement of goods or services but does not result in financial postings.

Approval of a purchase requisition (B)is a preliminary step in the procurement process that authorizes the purchase but does not involve financial postings.

Inbound delivery to the warehouse (C)involves the physical receipt of goods but the financial impact is recorded at the time of the post valuated goods receipt.