There should be a possibility to define Approval flow for Service Requests based on the roles in CMDB. For example, if Service Owner for a specific Service is defined in CMDB, the approval of the Service Request should go to the person who has been defined as a owner for that Service in which the request definition belongs to.
If there is a service in CMDB called "Email Service" and its Service Owner is person X
Request definition is created for Service called "Email Service"
There should be possibility to select that Approval goes to the Service Owner of this service, so in this case to the person X