To transition the department's current buyers into category managers with minimal organizational disruption, adopting a center-led purchasing organization is the best approach. In this arrangement, new category managers report to the supply manager while remaining at their original locations. Leadership and transformation management documents highlight the benefits of a center-led structure, which combines the advantages of centralized control and decentralized execution. This structure allows for consistent strategy and policy implementation across the organization while maintaining the flexibility of decentralized operations. Reference from these documents emphasize that this hybrid approach minimizes disruption and ensures a smooth transition by leveraging existing relationships and local knowledge.