Think of a Request as a service ticket.
Create a new Service Request every time a customer asks for help. Over time, you’ll accumulate a  complete Service History for every product and user group. Having this information readily available will make it easier for your service team to assist customers.
Service Requests are linked to Devices(s), Contact(s) and an Account.
Below is the Service Request form:
 
Fig 1: Service Request
1. Linked Account
2. Account Structure and Account address
3. Linked Contact(s)
4. Attachments
5. Service Request details
6. Devices related to this Request
7. Sections of Custom Fields (optional).
All activities related to the Request are displayed below sections of Custom Fields.