Implement a flat structure with a single management group for all departments, applying granular RBAC roles and Azure Policies at the subscription level to enforce access controls and auditing.

Design a deep hierarchy of management groups mirroring the organizational structure, assigning specific RBAC roles and Azure Policies at each level to ensure department-specific access controls and auditing.

Utilize resource groups exclusively for access control and auditing, ignoring management groups and subscriptions to simplify the architecture.

Adopt a balanced hierarchy of management groups that reflects the organizational structure moderately, applying well-defined RBAC roles and Azure Policies at appropriate levels for scalable access control and auditing.

Combine a balanced hierarchy of management groups with Azure Blueprints to standardize deployments, ensuring consistent access controls and auditing across all departments.