I think the term you are looking for is service design, see the following definition from wiki :
Service design is a form of conceptual design that involves the
activity of planning and organizing people, infrastructure,
communication and material components of a service in order to improve
its quality and the interaction between the service provider and its
customers. Service design may function as a way to inform changes to
an existing service or create a new service entirely. The purpose of
service design methodologies is to establish best practices for
designing services according to both the needs of customers and the
competencies and capabilities of service providers. If a successful
method of service design is employed, the service will be
user-friendly and relevant to the customers, while being sustainable
and competitive for the service provider. For this purpose, service
design uses methods and tools derived from different disciplines,
ranging from ethnography (Segelström et al., Ylirisku and Buur, 2007,
Buur, Binder et al. 2000; Buur and Soendergaard 2000) to information
and management science (Morelli, 2006) to interaction design (Holmlid,
2007, Parker and Heapy, 2006).