A service manager manages a specific service as if it were its own production, the role is the primary contact for the service, and represents the service in internal forums and processes.
Service Manager is a stakeholder in all processes within the IT department and serves as the first escalation contact at the tactical level.
For supporting services, the role’s primary focus is on internal efficiency in handling matters; we keep the right quality? We can produce more efficient? What is the next step in the development?