Extended WS-FIT model to enhance the fault tolerance in the dynamic composite web service

Numerous web services are evolving now. Organizational work flows are simulated by using composite web services. Because of the increasing number of web services, atomic web services that are involved in the composite web service are selected dynamically. Quality of Service (QoS) in web service plays a vital role today. Among all QoS metrics, reliability plays the dominant role. One of the reliability factors is dependability. Dependability is the ability to avoid service failures. In this paper, a extended model of WS-FIT is proposed to increase the dependability in the dynamic composite web service using fault injection technique.