This article presents a methodology for performance analysis and configuration of audio/video- on-demand services. To maintain a good quality of service and to make a profit for the content provider, services must have the optimum configuration. With this aim, the configuration process must be based on an accurate service behavioural analysis which evaluates the quality and the quantity of resources, contents and subscribers. This analysis can be performed using monitored information and predictions of a near future behaviour using laboratory experiments. To formalize both analysis and configuration, a methodology must be developed in order to help service managers attain a good performance and at the same time, make a profit for their companies. All the methodology goals are based on the principle that ‘a satisfied client provides more profit‘. Moreover, the methodology is prepared to be extensible, and adaptable to new configuration possibilities, data, analyses or goals.