Researchers in the THINC lab are investigating ways to keep Web service compositions optimal in the context of a volatile environment that exhibits varying quality-of-service parameters for Web services. In order to remain up-to-date with the parameters, selected providers may be queried for their revised information. In this context, a novel method called the value of changed information is proposed that selects those services for querying whose revised parameters are expected to bring about the most change in the composition while being cognizant of the cost of querying. This method is being applied toward adapting compositions with varying structure in an efficient manner. Learn more