An overview of workflow management: from process modeling to workflow automation infrastructure
Distributed and Parallel Databases - Special issue on software support for work flow management
Approximation algorithms for NP-hard problems
Approximation algorithms for NP-hard problems
Workflow and Process Automation: Concepts and Technology
Workflow and Process Automation: Concepts and Technology
Workflow Management Systems and Interoperability
Workflow Management Systems and Interoperability
Computers and Intractability: A Guide to the Theory of NP-Completeness
Computers and Intractability: A Guide to the Theory of NP-Completeness
Deriving Service Models in Cross-Organizational Workflows
RIDE '99 Proceedings of the Ninth International Workshop on Research Issues on Data Engineering: Information Technology for Virtual Enterprises
Contracts for Cross-Organizational Workflow Management
EC-WEB '00 Proceedings of the First International Conference on Electronic Commerce and Web Technologies
A Process Service Model for Dynamic Enterprise Process Interconnection
CooplS '01 Proceedings of the 9th International Conference on Cooperative Information Systems
Trusted Mediation for E-service Provision in Electronic Marketplaces
WELCOM '01 Proceedings of the Second International Workshop on Electronic Commerce
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The workflow concept has been very successful in streamlining business processes by automating the coordination of activities, but has so far been limited to the use within single organizations. Any attempt to distribute workflows among different organizations has to face the problems posed by the complex relationship among autonomous organizations and their services. To address these problems we propose a service-oriented model for cross-organizational workflows. Modeling the workflow execution as a cooperation of services allows different organizations to interact via well-defined interfaces. We further show how the execution can be optimized by selecting services depending on their contribution to quality criteria of the workflow.