A reliability model for web services From the consumers´ perspective

This paper proposes a model to quantify the reliability of web services. Based on their structures, web services can be classified into the following two kinds: atomic web service which calls no other web services and composite web service consisting of atomic web services. The model first evaluates the reliability of atomic web services from the consumers´ perspective. After that this paper points out redundancy is a very effective approach to improve the reliability of composite web services. Then the reliability issue of composite web services is discussed. A method of computing the aggregating reliability of composite web services is introduced using the structure information with the assumption that the reliabilities of atomic web services in the composite web services are available.