What role does a Center of Excellence (CoE) play in a large-scale SAP transformation?

A Center of Excellence is a centralized team (or federated network of teams) responsible for maintaining consistent standards, governance, and best practices across a transformation program that otherwise spans many individual project workstreams, business units, and vendor/partner teams — providing the connective tissue that keeps a large, distributed effort architecturally coherent.

flowchart TB
    A[Center of Excellence] --> B[Architecture standards & governance]
    A --> C[Reusable patterns/accelerators across workstreams]
    A --> D[Skills development and knowledge sharing]
    A --> E[Quality assurance across vendor/partner deliverables]

Without a CoE, large programs risk each workstream inventing its own inconsistent patterns, duplicating effort building similar capabilities independently, and losing institutional knowledge as external implementation partners rotate off the program — a CoE is specifically the mechanism for retaining and propagating consistent architectural discipline across a program too large for any single team to oversee directly end to end.