QW2002 Paper 2I2

Dr. Selim Aissi
(Intel)

Web Services QoS Indicators

Presentation Abstract

Web Services are self-contained, self-describing, modular applications that can be published, located, and invoked across the Web. QoS of a Web Service is its ability to have some level of assurance that its service and traffic requirements are satisfied in a timely fashion. That means that all the components of a Web Service need to be considered when evaluating its QoS: backbone, core, access, and applications.

So, what are the criteria (Quality Indicators) of a usable and reliable Web Service? When dealing with QoS, it is critical to have an end-to-end view of Web Services because they represent a paradigm shift in the way applications are developed. Modules are no longer modules by one party. Some of the functionality a user will get by calling Web services. But then, that user will need to be very careful which services are useful and which are not. Some sites are doing a great service by providing acceptance tests and expected results, but they still provide a granular view of QoS since they only validate only one component. This presentation addresses the end-to-end challenges of Web Services QoS.

About the Author

Dr. Aissi has been involved in the development of Safety-Critical Embedded Systems in the R&D, military, automotive, and wireless appliances for over twelve years. He worked at the University of Michigan, General Dynamics (M1A2 Abrams Battlefield Tank Division), General Motors (Embedded Controller Excellence Center), Applied Dynamics International, and Intel Corporation. Dr. Aissi has played several management and architecture roles at Intel, and he is currently a Sr. Architect at Intel's Corporate Technology Group in Hillsboro, Oregon, USA and serves as the Intel representative to several Web Services Standards Working Groups, including the OASIS CPPA and the UDDI Technical Committees. He holds a Ph.D. in Aerospace Engineering from the University of Michigan.