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Services 
Used to describe a service supplied to a point of delivery.
Services can be billable or non-billable. All the own or external services that are billed and/or invoiced are modeled as contracts in SAP IS-U. These contracts are also described as billable services. All other services are non-billable services.
The most important attributes of services are as follows:
· Service type to describe the type of service
Service types can be freely defined. In Customizing you must allocate them to a predefined SAP service category.
All the service types that do not correspond to one of the predefined service categories can be allocated to the Other service category. If you want to continue using a service type based on the Other service category internally, you must modify the templates individually.
· Service provider as a service agent
For more information on service providers, see service providers.
· Validity period of service
In the case of a billable service (contract), the validity period is based on the move-in and move-out dates. The service type is contained in the corresponding installation.
The non-billable are modeled as an own entity in the point of delivery. This is why they are referred to as point of delivery services.

