Artificial Intelligence - Special issue on knowledge representation
Reasoning about qualitative temporal information
Artificial Intelligence - Special volume on constraint-based reasoning
A generic arc-consistency algorithm and its specializations
Artificial Intelligence
Temporal workflow management in a claim handling system
WACC '99 Proceedings of the international joint conference on Work activities coordination and collaboration
Maintaining knowledge about temporal intervals
Communications of the ACM
Failure Handling and Coordinated Execution of Concurrent Workflows
ICDE '98 Proceedings of the Fourteenth International Conference on Data Engineering
Specifying and Enforcing Intertask Dependencies
VLDB '93 Proceedings of the 19th International Conference on Very Large Data Bases
Time Constraints in Workflow Systems
CAiSE '99 Proceedings of the 11th International Conference on Advanced Information Systems Engineering
Geo-Opera: Workflow Concepts for Spatial Processes
SSD '97 Proceedings of the 5th International Symposium on Advances in Spatial Databases
Temporal Reasoning for Automated Workflow in Health Care Enterprises
Proceedings of the Workshop at NIST on Electronic Commerce, Current Research Issues and Applications
Business Operation Intelligence
DNIS '02 Proceedings of the Second International Workshop on Databases in Networked Information Systems
Collaborative coordination of activities with temporal dependencies
OTM'10 Proceedings of the 2010 international conference on On the move to meaningful internet systems - Volume Part I
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The need for explicit time management in workflow environments has been recently identified. Although the concept of time is inherent in workflow applications, time management until now has been treated by the same general-purpose structures of the workflow system. This traditional approach does not allow for explicitly specifying timing correctness requirements, temporal consistency checking, immediate control over the diverse set of time constraints that workflow applications exhibit and timely monitoring of the environment. In this paper, we extend the existing workflow specification based on the requirements posed by real-life applications such as health systems. We argue that time management should be an integral part of the workflow management system and not performed by a general-purpose temporal reasoner. We incorporate a subset of interval algebra that allows for efficient consistency checking, while providing expressiveness of temporal constraints. We show that static scheduling for meeting temporal constraints is inadequate for a large class of workflow applications. We show how global scheduling based on temporal constraints can be combined with agent scheduling policies. We demonstrate through examples the working of the scheduling algorithms.