creators_name: Tarasyuk, Anton creators_name: Troubitsyna, Elena creators_name: Laibinis, Linas creators_id: Anton.Tarasyuk@abo.fi creators_id: Elena.Troubitsyna@abo.fi creators_id: Linas.Laibinis@abo.fi type: conference_item datestamp: 2012-06-29 07:54:42 lastmod: 2012-06-29 07:54:42 metadata_visibility: show title: Formal Modelling and Verification of Service-Oriented Systems in Probabilistic Event-B ispublished: inpress subjects: Event-Bsemantics subjects: Refinement subjects: deploy_method subjects: deploy_method_proof subjects: examples full_text_status: none pres_type: paper abstract: Modelling and refinement in Event-B provides a scalable sup- port for the development of complex service-oriented systems. Refinement in Event-B supports a systematic service development by a gradual trans- formation of an abstract specification into a detailed service architecture. In this paper we aim at integrating quantitative assessment of desired quality of essential service attributes into formal modelling process. We propose an approach to creating and verifying a dynamic service architecture in Event- B. Such an architecture can be augmented with stochastic information and transformed into the corresponding continuous-time Markov chain represen- tation. By relying on probabilistic model-checking techniques, we allow for quantitative evaluation of quality of service attributes at early development stages. The approach is illustrated by a simple case study. date: 2012 date_type: published event_title: 9th International Conference on Integrated Formal Methods – IFM 2012 event_location: Pisa, Italy event_type: conference refereed: TRUE citation: Tarasyuk, Anton and Troubitsyna, Elena and Laibinis, Linas (2012) Formal Modelling and Verification of Service-Oriented Systems in Probabilistic Event-B. In: 9th International Conference on Integrated Formal Methods – IFM 2012, Pisa, Italy. (In Press)