To be successful in the face of increasing competition and high custom
er expectations, an operator must be able to manage not only its infra
structure, but also the whole concept of service. This article conside
rs how effective service management can be practical means for service
providers to retain control of the supplier/customer relationship. Se
rvice management describes the mechanisms for organising all aspects o
f the relationship between operator and customer. The article examines
the choices open to operators, particularly either network- or servic
e-oriented (NetCo and ServCo), the types of knowledge necessary for su
ccessful service management and considers five approaches, each applic
able to different types of service and business criteria.