SAP often uses the word Procurement instead of Purchasing.
Procurement includes the whole process flow from the requisition to invoice payment.
Monash University has set up Procurement Services under the management of Harry Bracegirdle. This section has been established to determine and pursue strategic purchasing initiatives which will include negotiating central supply contracts. See more information at the Procurement Services website. This code can be used to extract expenditure against the material code. At Monash this list has been modified to suit our purposes.