Web service composition techniques traditionally utilize the functional and quality-of-service parameters of candidate services to decide which services to include in the composition. However, users of services often form an opinion, somewhat subjective, of a service. This opinion may be based on prior interactions with the service, and may include judgments such as whether the perceived behavior of the service conforms to its stated behavior and intangibles such as the overall experience of the user with the service. Composition techniques that additionally consider this assessment of services by users will form compositions that likely behave in practice as stated, and which are better received by the users. Researchers in the THINC lab have developed a separate trust framework, called Wisp, that computes the aggregate trust in the composition from trust in individual Web services, and selects the composition that is most trustworthy. Learn more