The composition of web-based services is a process that usually requires advanced programming skills and vast knowledge about specific technologies. How to carry out web service composition according to functional sufficiency and performance is widely studied. Nonfunctional characteristics like reliability and security play an important role in the selection of web services composition process. This paper provides a web service reliability model for atomic web service without structural

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... ion and the composite web service consist of atomic web service and its redundant services. It outlines a framework based on client feedback to gather trustworthiness attributes to service registry for reliability evaluation.