Automated prediction of the QoS of service orchestrations: PASO at work

Predicting the QoS of a service orchestration is not easy because of the a priori undetermined behaviour of invoked services, and because of the non-determinism (alternatives, unbounded iterations, fault handling) and complex structure (dependencies, correlations) of the workflow defining a service orchestration. In this paper we illustrate the practical usefulness of a probabilistic analyser of service orchestrations (PASO) by showing how it can be fruitfully exploited to predict the QoS of service orchestrations