USM addresses the systematic routines for managing service delivery. Service delivery is an interaction between the customer and the service provider. These interactions can occur both within organizations (internal service delivery) and between organizations.
Figure 4.2 in the USM Repository emphasizes that the service is a product of that service provider, delivered by that service provider upon demand of the customer. After all, the service is a supported facility, and both the facility and the support are produced by the service provider and used by the customer.
The details of the USM process model (Fig. 5.7 from the Repository) and the USM workflows (Figs. 5.9 through 5.15) can then be plotted as the standard components for each service provider in that Customer-Provider Interaction Model, see the figure below.
The USM Customer-Provider Interaction Model now acts as the link in supply chains and networks of collaborating service providers, both in supply chains and networks within organizations and between organizations. Used in this way as the standard link, efficient supply chains and networks can be built, for example for data exchange in healthcare (see the USM guideline on DIZRA or the DIZRA source) or in government (see e.g. NORA or the Dutch API strategy). See the figure below for an example of such a chain of USM links.