Quality driven web services composition
WWW '03 Proceedings of the 12th international conference on World Wide Web
Web Service Composition Using Integer Programming-based Models
ICEBE '05 Proceedings of the IEEE International Conference on e-Business Engineering
Performance engineering of service compositions
Proceedings of the 2006 international workshop on Service-oriented software engineering
Optimal Web Services Selection Using Dynamic Programming
ISCC '06 Proceedings of the 11th IEEE Symposium on Computers and Communications
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In the SOA paradigm service composition enables creation of business processes and workflows by assembling together simple or composite services in a particular sequence. In such a distributed architecture possibly involving multiple service providers, optimal selection of service implementations from an existing pool of services, based on QoS and cost factors assumes critical practical relevance. In this paper, we analyze various complex service provider configurations, where multiple business functionalities (comprising a business process) are available as simple or composite services from multiple service providers (some possibly working in coalitions) at varying QoS and cost attribute values. We study the service composition constraints resulting in such a context and propose an algorithm to formally capture these special constraints and represent these into simple weighted multi-stage graphs suitable for subsequent application of various optimization techniques cited in the literature.