You can use the service master record as a data source when developing service specifications because it is considered to be part of the master data in External Services Management.
How to Setup Settings in Service Master
How to add a Services Template?
Master ⇒ Service ⇒ Add New
Service Status: The Service name will display what we created from the Service Master
Process Name: The Process name will display what we created from the Process Master
Material Name: The material name will display what we created from the Raw Materials
Unit of Measurements: The Unit of measurement will display what we created from the unit of measurement master.