Scenario-Based Early Reliability Model for Distributed Software

The ability to predict the reliability of software system early can help to improve the quality of system. A scenario-based early reliability model for distributed software system is proposed in this paper. The distributed system is composed of subsystems and components. Using the scenarios of the component interactions, which are described by sequence diagrams, we construct a simplified communication diagram to obtain the interaction parameters in the scenarios. The error propagation between the components is taken into account in our model, which is often overlooked in previous researches. An example is illustrated to show the effectiveness of the proposed model.