Spend Analysis for Commodity Code in ECC6

Hi,

I wonder if there is any way for spend analysis references to commodity code in SAP R3 as we are not using SAP SRM?

If there is any option in ECC6 then;

a) Which field/view maintained for Commodity code at Material Master?

b) Which field maintained for Commodity code at /PO/Contract/RFQ/Purchase Requisition (Header level or item level)?

c) How spend analysis can be reported based on commodity code? (Standard report, Z custom report, BI report)

Thanks,

Shah.