A company's supply chain depends heavily on sourcing from international suppliers.

When supply continuity is threatened due to heavy dependence on international suppliers, the most appropriate action is to conduct a risk assessment. This involves systematically identifying potential risks, evaluating their impact, and developing strategies to mitigate them. The risk assessment provides a comprehensive understanding of vulnerabilities and helps in making informed decisions on sourcing strategies, inventory management, and logistics.

Sourcing from domestic suppliers may reduce some risks but might not be feasible or cost-effective without a thorough assessment.

Carrying additional safety stock is a mitigation strategy but does not address the root cause of supply risk.

Spreading logistics across multiple carriers can help manage transportation risks but does not cover the broader supply chain risks.

References:

Christopher, M. (2011). "Logistics & Supply Chain Management."

Waters, D. (2011). "Supply Chain Risk Management: Vulnerability and Resilience in Logistics."