Workflow Time Patterns for Process-aware Information Systems

Formal specification and operational support of time constraints constitute fundamental challenges for any process-aware information system. Although temporal constraints play an important role in the context of long-running business processes, time support is limited in existing process management systems. By contrast, different kinds of planning tools (e.g., calendar systems, project management tools) provide more sophisticated facilities for handling task-related time constraints, but lack operational support for business processes. This paper presents a set of time patterns to foster systematic design and comparison of the different technologies in respect to the time perspective. These time patterns are all based on empirical evidence from several large case studies. Their widespread use will contribute to further maturation of process-aware information systems and related evaluation schemes

Time Patterns for Process-aware Information Systems: A Pattern-based Analysis - Revised version

Formal speci�cation and operational support of time constraints constitute fundamental challenges for any enterprise information system. Although temporal constraints play an important role in the context of long-running business processes, time support is very limited in existing process management systems. By contrast, di�fferent kinds of planning tools (e.g., calendar systems and project management tools) provide more sophisticated facilities for handling task-related time constraints, but lack an operational support for business processes. This paper presents a set of 10 time patterns to foster the systematic design and comparison of these different technologies in respect to time management. These time patterns are all based on empirical evidence from several large case studies. In order to ease use and implementation for each time pattern we provide a precise formal semantics. In addition, we provide an in-depth evaluation of selected process management systems, calendar systems and project management tools based on the suggested patterns. The presented work will not only facilitate comparison of these diff�erent technologies in respect to their support of time constraints, but also make evident that their integration o�ers promising perspectives in respect to time support for long-running business processes. Their widespread use will contribute to further maturation of process-aware information systems and related evaluation schemes

Necessary but not sufficient: the role of the EU in resolving Turkey's Kurdish question and the Greek--Turkish conflicts.

The article presents a comparative analysis of the role of the European Union (EU) in resolving Turkey's Kurdish question and the Greek-Turkish conflicts. The results yield important insights, both in terms of evaluating the role of the EU in conflict resolution and of assessing the relative strengths and weaknesses of the Conflict Resolution and European Studies literatures

Time Patterns for Process-aware Information Systems: A Pattern-based Analysis

Formal specification and operational support of time constraints constitute fundamental challenges for any enterprise information system. Although temporal constraints play an important role in the context of long-running business processes, time support is very limited in existing process management systems. By contrast, different kinds of planning tools (e.g., calendar systems and project management tools) provide more sophisticated facilities for handling task-related time constraints, but lack an operational support for business processes. This paper presents a set of 10 time patterns to foster the systematic comparison of these different technologies in respect to time management. The proposed patterns are all based on empirical evidence from several large case studies. In addition, we provide an in-depth evaluation of selected process management systems, calendar systems and project management tools based on the suggested patterns. The presented work will not only facilitate comparison of these different technologies in respect to their support of time constraints, but also make evident that their integration offers promising perspectives in respect to time support for long-running business processes

Time patterns for process-aware information systems

Companies increasingly adopt process-aware information systems (PAISs) due to their promising perspectives for improved business process support. Although the proper handling of temporal constraints is crucial in this context, existing PAISs vary significantly regarding their support of the temporal perspective of a business process. To make PAISs comparable with respect to their ability to deal with temporal constraints and to facilitate the development of a time-aware PAIS, this paper suggests 10 time patterns. All patterns are based on empirical evidence we gathered in case studies. Additionally, they are validated through a systematic literature review. Based on the time patterns, we then provide an in-depth evaluation of selected PAISs and academic approaches. Altogether, the 10 time patterns will not only facilitate the selection of technologies for realizing time- and process-aware information systems but can also be used as reference for implementing time support in PAISs

Patterns-based Evaluation of Open Source BPM Systems: The Cases of jBPM, OpenWFE, and Enhydra Shark

In keeping with the proliferation of free software development initiatives and the increased interest in the business process management domain, many open source workflow and business process management systems have appeared during the last few years and are now under active development. This upsurge gives rise to two important questions: what are the capabilities of these systems? and how do they compare to each other and to their closed source counterparts? i.e. in other words what is the state-of-the-art in the area?. To gain an insight into the area, we have conducted an in-depth analysis of three of the major open source workflow management systems - jBPM, OpenWFE and Enhydra Shark, the results of which are reported here. This analysis is based on the workflow patterns framework and provides a continuation of the series of evaluations performed using the same framework on closed source systems, business process modeling languages and web-service composition standards. The results from evaluations of the three open source systems are compared with each other and also with the results from evaluations of three representative closed source systems - Staffware, WebSphere MQ and Oracle BPEL PM, documented in earlier works. The overall conclusion is that open source systems are targeted more toward developers rather than business analysts. They generally provide less support for the patterns than closed source systems, particularly with respect to the resource perspective which describes the various ways in which work is distributed amongst business users and managed through to completion