1 Introduction. - 1. 1 Process Modeling. - 1. 2 Why Decentralization ?. - 1. 3 A Motivating Example. - 1. 4 Research Focus. - 1. 5 Requirements. - 2 Previous and Related Work. - 2. 1 PCEs. - 2. 2 Marvel: The Predecessor PCE. - 2. 3 Other Domains. - 3 The Decentralized Model. - 3. 1 Definitions. - 3. 2 Defining Process Interoperability: the Treaty. - 3. 3 Enacting Process Interoperability: the Summit. - 3. 4 The Motivating Example Revisited. - 3. 5 Application of the Model. - 3. 6 Groupware Tools and Delegation in Summits. - 3. 7 Extensions and Alternatives to the Decentralized Model. - 4 Realization of the Decentralized Model in Oz. - 4. 1 Operational Overview of Oz. - 4. 2 Oz Objectbase. - 4. 3 Defining Process Interoperability in Oz. - 4. 4 Multi-Process Enactment in Oz. - 4. 5 Support for Delegation and Groupware in Oz. - 4. 6 Implementation Status. - 5 Architectural Support for Decentralization in Oz. - 5. 1 Architectural Overview. - 5. 2 Communication Infrastructure. - 5. 3 A Process for Site Configuration. - 5. 4 Context Switching in Summit. - 5. 5 The Remote Object Cache. - 5. 6 Oz Over the Internet. - 5. 7 Implementation Status. - 6 The ISPW Example: Validation and Methodology Issues. - 6. 1 Overview of the Scenario. - 6. 2 Solution in Oz. - 6. 3 Methodology Issues. - 7 Summary Evaluation and Future Work. - 7. 1 Evaluation. - 7. 2 Future Directions. - A Configuration Process Sources. - A. 1 Registration Strategy. - A. 2 A Sample Oz Envelope. - B The ISPW-9 Problem: Definition and Solution in Oz. - B. 1 The ISPW-9 Example. - B. 2 Solution in Oz. - References. Language: English