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Revision with unchanged content. Meanwhile web-services are starting to be established through out the busi ness world, but web-services only offer stateless operation calls. Since workflow management systems are widely accepted to execute long-term (stateful) business processes within companies, the next step of great interest is to make stateful cooperative processes available through the web, so that two or more partners can collaborate in a long-term business process. BPEL is a joint attempt of Microsoft and IBM to establish a standard to make such cooperative processes available through the web. We attempt to enhance robustness and flexibility of these processes by introducing quality cons traints. The whole of all quality constraints referring to a process ins tance should provide a frame, in which the flow of this process instance is correct. To prove the concept of our quality constraint approach called WEPD (Web-Flow Extended Process Description) we implemented MaX (Monitoring and eXception handling component). This book defines WEPD and explains the implementation of the monitoring component of MaX. It is written for computer science graduate students as well as IT professionals and IT mana gers.

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MBA, MSc, Studies of Business Administration and Studies of Computer Science at the University of Leipzig. He worked at Accenture as Business Analyst in Strategy Consulting before setting up his own business Berr&Berr in the UK.

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