| Abstract [eng] |
Business processes are constantly changing, so the infrastructure that implements them must be flexible. Service-oriented architecture systems must support business process variability, ensur-ing adaptation for different contexts and reusability. The paper examines service-oriented systems aimed to meet the needs of the business level. They must be adapted to a certain range of changes to support variability of business processes, business functionality and quality requirements. In existing methodologies, variability specification and modeling are based on business service func-tional properties. Non-functional features are defined in the service contract, which sets the levels of service quality parameters. These features are not included in the modeling of the service itself. In this work, a method for specifying the variability of non-functional properties of service-oriented systems is developed. It describes the qualitative attributes of the service that influence the choice of the service implementation variant. Moreover, the developed method describes the configuration of the individualized variant of the service. The application of the method is illus-trated by an example in which the variants provided by the authentication service of web services are configured considering the non-functional features such as usability and security. |
