Here are 3 key measures I would use to quickly assess the strength/performance of a procurement function:
1. Annual savings as a percentage of addressable spend - This tells me how effective they are at reducing costs.
2. Stakeholder satisfaction scores - This indicates how well procurement is meeting the needs of internal customers.
3. Supplier satisfaction scores - This shows how well procurement is managing relationships with external suppliers.
Getting feedback from both internal and external customers would give a good sense of how well the procurement function is performing in key areas. The annual savings metric quantifies the financial impact. Together these 3 measures provide a quick, high-level view of procurement performance.