Reasonable properties for the ordering of fuzzy quantities (I)
Fuzzy Sets and Systems
Similarity and compatibility in fuzzy set theory: assessment and applications
Similarity and compatibility in fuzzy set theory: assessment and applications
QoS computation and policing in dynamic web service selection
Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters
QoS-Aware Service Composition in Dino
ECOWS '07 Proceedings of the Fifth European Conference on Web Services
A framework for semantic querying of distributed data-graphs via information granules
ISC '07 Proceedings of the 10th IASTED International Conference on Intelligent Systems and Control
A fuzzy approach for negotiating quality of services
TGC'06 Proceedings of the 2nd international conference on Trustworthy global computing
A qos-aware selection model for semantic web services
ICSOC'06 Proceedings of the 4th international conference on Service-Oriented Computing
A survey of fuzzy service matching approaches in the context of on-the-fly computing
Proceedings of the 16th International ACM Sigsoft symposium on Component-based software engineering
Fuzzy service matching in on-the-fly computing
Proceedings of the 2013 9th Joint Meeting on Foundations of Software Engineering
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Service composition concerns both integration of heterogeneous distributed applications and dynamic selection of services. QoS-aware selection enables a service requester with certain QoS requirements to classify services according to their QoS guarantees. In this paper we present a method that allows for a fuzzy-valued description of QoS parameters. Fuzzy sets are suited to specify both the QoS preferences raised by a service requester such as 'response time must be as lower as possible and cannot be more that 1000ms' and approximate estimates a provider can make on the QoS capabilities of its services like 'availability is roughly between 95% and 99%'. We propose a matchmaking procedure based on a fuzzy-valued similarity measure that, given the specifications of QoS parameters of the requester and the providers, selects the most appropriate service among several functionally-equivalent ones. We also devise a method for dynamical update of service offers by means of runtime monitoring of the actual QoS performance.