Situation-Aware Execution and Dynamic Adaptation of Traditional Workflow Models

Képes, Kálmán; Breitenbücher, Uwe; Sáez, Santiago Gómez; Guth, Jasmin; Leymann, Frank; Wieland, Matthias

doi:10.1007/978-3-319-44482-6_5

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…Applications observe their situations and adapt behavior if necessary via the SitOPT system. The adaption is done on orchestrated processes, which additionally could use process fragments, a set of process activities, based on the current state of situations presented in Képes et al (2016). Depending on the situations, the Situation Handler, a situation-aware service bus, is responsible for executing the corresponding, situation-dependent process fragment.…”

Section: Situation Adaptive Workflowsmentioning

confidence: 99%

Situation-aware adaptation of choreographies—The DiStOPT approach

Hirmer

Breitenbücher²,

Gaudio³

et al. 2022

Front. Internet Things

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The rise of the IoT and Industry 4.0 has increased the complexity of collaborating business processes, i. e., choreographies, as more partners and assets are involved. However, maintaining and executing business choreographies are complex tasks. Moreover, enabling robust and reliable execution is important, as failures or delays cause high costs among partners. For example, manufacturing companies usually depend on different suppliers, and it is crucial to be up-to-date about possible delays in shipments as this leads to delays in the manufacturing of their products. In this case, a choreography needs to be designed and operated in a way that it can adapt to cope with such problems. This requires i) timely recognition and tamper-resistent logging of problems that occur at each involved partner, which are referred to as situations in the scope of this article, and ii) an approach for a timely adaptation of choreographies based on occurring situations. Therefore, in this article, we introduce DiStOPT, an approach to i) model and recognize situations in a distributed and timely manner, and ii) model and execute situation-aware choreographies based on the recognized situations. The contributions are evaluated in a manufacturing scenario and validated by a prototypical implementation.

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Section: Situation Adaptive Workflowsmentioning

confidence: 99%

Situation-aware adaptation of choreographies—The DiStOPT approach

Hirmer

Breitenbücher²,

Gaudio³

et al. 2022

Front. Internet Things

Self Cite

View full text Add to dashboard Cite

show abstract

“…Based on these annotations, the abstract tasks that are modeled in a workflow are dynamically replaced by fine-grained workflow fragments at runtime. Képes et al [46] introduce an approach to adapt workflows based on the current situation. Therefore, they use a repository with workflow fragments defining the action that they implement and the situation when they can be used.…”

Section: Related Workmentioning

confidence: 99%

Automated Quantum Hardware Selection for Quantum Workflows

et al. 2021

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The execution of a quantum algorithm typically requires various classical pre- and post-processing tasks. Hence, workflows are a promising means to orchestrate these tasks, benefiting from their reliability, robustness, and features, such as transactional processing. However, the implementations of the tasks may be very heterogeneous and they depend on the quantum hardware used to execute the quantum circuits of the algorithm. Additionally, today’s quantum computers are still restricted, which limits the size of the quantum circuits that can be executed. As the circuit size often depends on the input data of the algorithm, the selection of quantum hardware to execute a quantum circuit must be done at workflow runtime. However, modeling all possible alternative tasks would clutter the workflow model and require its adaptation whenever a new quantum computer or software tool is released. To overcome this problem, we introduce an approach to automatically select suitable quantum hardware for the execution of quantum circuits in workflows. Furthermore, it enables the dynamic adaptation of the workflows, depending on the selection at runtime based on reusable workflow fragments. We validate our approach with a prototypical implementation and a case study demonstrating the hardware selection for Simon’s algorithm.

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“…Wieland et al [36] proposed an approach to runtime adaptation of situation-aware workflows. To simplify the modeling of situation-aware workflows, Képes et al [37] proposed an approach to enabling the transformation of a traditional workflow model into a situation-aware workflow model. Bucchiarone et al [38] proposed a planningbased approach to address the consistency issues of contextaware dynamic service composition and execution.…”

Section: Related Workmentioning

confidence: 99%

Toward Supporting Unplanned Dynamic Changes of Service-Based Business Processes

et al. 2019

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Service-oriented architecture (SOA) has become an application development paradigm widely recognized both in academia and in industry. Although SOA-based applications may vertically implement business processes through the composition of loosely coupled services, they have to face frequent changes, such as unavailability of service (due to the uncontrollable, dynamic, and distributed environments) or dynamic replacement of service (due to specific user requirements). This indicates that the service compositions are expected to be adaptable enough to cater to such changing situations. In this paper, we propose an approach to supporting unplanned dynamic changes of service compositions by combining variability management and dynamic binding. The proposed approach introduces the concept of abstract proxy services in a variability-supporting service composition language, namely VxBPEL, and provides a mechanism to support variation design and dynamic binding for unplanned changes at run time. To realize the proposed approach, we have developed a service composition engine that supports abstract proxy services and their run-time replacement via service discovery or user intervention. Finally, a case study has been conducted to demonstrate the feasibility of the proposed approach and quantify the performance overhead resulting from runtime variability management and dynamic binding. The experimental results show that the proposed approach overcomes the limitation of imperative variability-based approaches in handling unplanned dynamic changes and further enhances the dynamic adaptability of VxBPEL-based service compositions. INDEX TERMS Service oriented architectures, variability management, dynamic binding, adaptive service composition, business process execution language for Web services.

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Situation-Aware Execution and Dynamic Adaptation of Traditional Workflow Models

Cited by 12 publications

References 13 publications

Situation-aware adaptation of choreographies—The DiStOPT approach

Situation-aware adaptation of choreographies—The DiStOPT approach

Automated Quantum Hardware Selection for Quantum Workflows

Toward Supporting Unplanned Dynamic Changes of Service-Based Business Processes

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