Which model of service integration involves a separate vendor managing service integration without delivering any services?

The model of service integration that involves a separate vendor managing service integration without delivering any services is known as a Separate Service Integrator. This approach allows an organization to have a dedicated entity overseeing the coordination and integration of various services provided by different vendors, ensuring that the services work seamlessly together without the integrator being responsible for the actual delivery of those services.

By employing a Separate Service Integrator, organizations can benefit from specialized expertise in service management and integration, while leveraging multiple service providers for their specific services. This model enhances flexibility and allows organizations to adapt their service portfolio as needed, as the integrator can facilitate the relationships and interactions among different service providers without having their own service offerings.

In contrast, a retained organization refers to the internal team that remains within the organization to manage service providers. The single supplier model involves a single vendor supplying multiple services, which contrasts with having a separate entity for integration. Lastly, the Service Guardian concept typically pertains to a role that ensures services are delivered as per the agreed standards but does not specifically indicate a separate entity managing integration.