Understanding PROCESSREQUEST Service
Services are used to logically group a set of service operations. The service PROCESSREQUEST contains all of the service operations for Process Scheduler. When you publish a web service, a WSDL document is created containing all of the selected service operations as well as the endpoints based on the Service Configuration.
This diagram illustrates how a client application consumes the web service

The Service page provides links to Provide Web Service and to Generate SOAP Template. The Provide Web Service wizard generates a WSDL document containing all of the service operations selected. This WSDL document is consumed by the client application.
The published web service is stored in the WSDL Repository. Client applications consume the WSDL by accessing the WSDL URL from the repository. The WSDL for PROCESSREQUEST is delivered and updated with the appropriate WSDL Repository location whenever the target location is updated on the Service Configuration page (Select PeopleTools, Integration Broker, Configuration, Service Configuration).