Which instance would multiple sourcing be the most applicable approach?

Multiple sourcing is particularly beneficial when requirements are time-sensitive and availability is critical. By engaging more than one supplier, the buyer ensures supply continuity, reduces dependency on a single provider, and improves responsiveness to urgent needs. While sole or single sourcing may suit high-cost strategic components or unique expertise, these arrangements increase dependency risks. For short-notice requirements such as consumables or basic components, multiple sourcing provides resilience and flexibility. CIPS L4M4 stresses that sourcing strategy should reflect risk, demand variability, and supply criticality, and multiple sourcing directly addresses supply risk mitigation.