The stability and resilience of a supply chain are critical aspects that determine its ability to continue operations or recover from major disruptions. This can be predicted by several factors, but the management of sub-tier suppliers by a primary supplier stands out. Effective management of sub-tier suppliers ensures that the primary supplier maintains a robust and responsive supply chain network. This includes risk management, quality control, and communication strategies that ensure continuity and quick recovery in case of disruptions. This approach is supported by leadership and transformation management principles, which emphasize the importance of comprehensive oversight and proactive risk management across all levels of the supply chain. Reference from transformation management documents highlight that well-managed sub-tier relationships contribute significantly to supply chain resilience.