Abstract: Supply chain management using a supplier portfolio index (SPI) is disclosed. A single risk and performance metric for a supplier can be used across portfolios at both the business unit and enterprise level. The SPI can be produced by stratifying suppliers to obtain a plurality of risk element scores, which in turn are used to obtain a composite supplier risk index. A supplier performance scorecard metric can also be determined by combining a plurality of individual performance metrics. The composite supplier risk index, the supplier performance scorecard metric, and an indication of supplier manager certification can be aggregated to produce SPI. Percentage weights can be applied to the composite supplier risk index, the supplier performance scorecard metric, and the indication of supplier manager certification status so that the SPI is indicated on a 100-point scale.