QoS-Aware Web Service Selection Accounting for Uncertain Constraints

The paper proposes a new approach for web service selection that takes into account the uncertainties existing both in the web services´ behavior with respect of their Quality of Service (QoS) properties and the clients´ non-functional requirements. The probability theory and the theory of fuzzy sets are used as a theoretical base for formalization of these uncertainties. The feasibility of the approach is proved through a real scenario for web service selection.