 segments interworking). The segmentation, that the network has been subject to, requires a number of perspectives from where the network can be seen and considered as a whole. Understanding Changing Telecommunications - Building a Successful Telecom Business Telecom management addresses the network in a holistic perspective, integrating its performance (performance and alarm management) and establishing the desired behaviour of the network (configuration management). Telecom management has a strong impact on the operator business. Important business issues like in-service performance, TTC, TTM, billing, marketing and customer care are deeply related to telecom management. To introduce any equipment, software or technology into the network demands a satis- factory solution regarding its integral management. Appendix 1 Web Services and a Service-Oriented Architecture A service-oriented architecture and web services enable re-use of software resources and information. A brief introduction is found in Chapter 3, Section 3.13. Display Start Select film Nr of tickets Confirm Get films Get time Get tickets Payment service Service interface Service enabler interface Database service requester services Credit card payment Update Web service provider Figure A1.1 Business or telecom process example. What to do when the process must be changed? Or new processes are required? Can sub-processes or smaller or larger SW units be used from other sources? Understanding Changing Telecommunications - Building a Successful Telecom Business. Edited by A. Olsson 2004 John Wiley & Sons, Ltd ISBN: 0-470-86851-1 Understanding Changing Telecommunications - Building a Successful Telecom Business Web services are part of a new architecture called a service-oriented architecture. This architecture eliminates the need for developers to repetitively design and build the same software components that solve the same set of recurring business problems, over and over again. In response to this, a service-oriented architecture enables greater use o