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Service Optimization and Quality

Nr.: IGC08020

Project Manager: Prof. dr. Hans van den Berg / dr. ir. Aiko Pras

Faculty of Electrical Engineering, Mathematics and Computer Science

Tel.: +31 53 489 3760 / 3778

Email: j.l.vandenberg@utwente.nl / a.pras@utwente.nl

Project website:


Service-oriented architectures (SOAs) have become the paradigm among businesses for enabling efficient and flexible business processes. In SOAs, composite services combine and integrate services offered by third parties. This has opened up a wealth of possibilities for creation of new services in many application areas, both within and outside of the home environment thus contributing to enhanced ambient living. In the competitive market of composite services, the commercial success of businesses is directly related to their ability to offer services at sharp price/quality ratios. This raises the critical need for realizing desired end-user perceived Quality of Service (QoS) levels at minimal cost.

A complicating factor in controlling QoS in service-oriented ICT is that the ownership of the service components (sub-services) is decentralized: a composite service makes use of service components offered by third parties. In practice, service providers tend outsource responsibilities by negotiating Service Level Agreements (SLAs) with third parties. Motivated by this, many SLA-based QoS concepts have been proposed, opening up the great potential for service providers to realize dramatic cost savings. However, the problem is that today only little is understood about how to effectively use these concepts, so that the potential for realizing cost savings remains largely under-utilized.

In this project, we will design and develop a quantitative-model based framework to efficiently control end-to-end QoS for composite services, and to demonstrate the effectiveness of this framework in a proof-of-concept.


Project duration: 4 years / 1-2-2008 / 1-1-2013

Project budget: 1 M-€

Number of person/years: 18.4 fte / 4.6 fte/year

Project Coordinator: TNO

Participants: TNO Information and Communication Technology (project leader), Center for Mathematics and Computer Science, University of Twente, IBM Nederland B.V., Ericsson Nederland B.V., Ordina, Mobilaria.

Project budget CTIT: 334.120 € / 257.590 € funding

Number of person/years CTIT: 4.5 fte / 1.13 fte/year

Involved groups: Design and Analysis of Communication Systems (DACS)