Which of the following is NOT one of the six sourcing strategies?

Monopoly suppliers, while mentioning a specific market structure, do not qualify as one of the recognized sourcing strategies. The term typically refers to a market situation where a single supplier dominates the market, which does not align with the strategic approaches organizations use to manage their sourcing.

The six sourcing strategies generally include methods such as using many suppliers to foster competition and reduce risk, or creating partnerships through joint ventures to enhance collaboration and resource sharing. Other common strategies include establishing relationships with few suppliers to deepen collaboration and securing reliability. These strategies are designed to optimize the supply chain, mitigate risk, and enhance overall efficiency.

Since monopoly suppliers indicate a lack of competition, they do not provide the benefits that sourcing strategies aimed at diversification or collaboration do. Thus, they are not categorized as a sourcing strategy in the operations and supply chain management framework.