Description: 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.

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