Dependency of Non-functional Properties of Web Services and QoS Evaluation

We analyze the features of non-functional properties of Web Services,study their classification,advance a method to dispose the uncertain features with fuzzy sets and grey systems,provide a measurement(i.e.relevance degree,based on rough sets) of dependency among the non-functional properties,which evolves the description(i.e.support degree,based on rough sets too) of essentiality how decision factors affect the decision results,and supply a new approach of QoS evaluation.