Time Management in Workflow Systems

Eder, Johann; Panagos, Euthimios; Pozewaunig, Heinz; Rabinovich, Michael

doi:10.1007/978-1-4471-0875-7_22

Cited by 97 publications

(55 citation statements)

References 1 publication

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“…While the research on quality of service for WfMS is limited, the research on time management, which is under the umbrella of workflow QoS, has been more active and productive. Eder et al (1999) and Pozewaunig et al (1997) present an extension of CMP and PERT by annotating workflow graphs with time, in order to check the validity of time constraints at process build-time and instantiation-time, and to take pre-emptive actions at run-time. The major limitation of their approach is that only directed acyclic graphs (DAG) can be modeled.…”

Section: Related Workmentioning

confidence: 99%

“…Most of the research carried out in order to extend workflow system capabilities to include project management features has mainly been done for the time dimension (Kao and GarciaMolina 1993;Bussler 1998;Eder, Panagos et al 1999;Marjanovic and Orlowska 1999;Dadam, Reichert et al 2000;Sadiq, Marjanovic et al 2000;Son, Kim et al 2001); this is only one of the dimensions under the workflow QoS umbrella. Even though some WfMSs currently offer time management support, the technology available is rudimentary (Eder, Panagos et al 1999). Research on workflow reliability issues has also been conducted, but the work was mostly on system implementation (Kamath, Alonso et al 1996;Tang and Veijalainen 1999;Wheater and Shrivastava 2000).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quality of service for workflows and web service processes

Cardoso

Sheth

Miller

et al. 2004

Journal of Web Semantics

738

288

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Workflow management systems (WfMSs) have been used to support various types of business processes for more than a decade now. In workflows for e-commerce and Web-services applications, suppliers and customers define a binding agreement or contract between the two parties, specifying Quality of Service (QoS) items such as products or services to be delivered, deadlines, quality of products, and cost of services. The management of QoS metrics directly impacts the success of organizations participating in e-commerce. Therefore, when services or products are created or managed using workflows, the underlying workflow system must accept the specifications and be able to estimate, monitor, and control the QoS rendered to customers. In this paper, we present a predictive QoS model that makes it possible to compute the quality of service for workflows automatically based on atomic task QoS attributes. To this end, we present a model that specifies QoS and describe an algorithm and a simulation system in order to compute, analyze and monitor workflow QoS metrics.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quality of service for workflows and web service processes

Cardoso

Sheth

Miller

et al. 2004

Journal of Web Semantics

738

288

View full text Add to dashboard Cite

show abstract

“…In turn, considerable research has been conducted concerning the modeling and verification of time-aware processes [13,5,14,15]. However, respective approaches either rely on traditional process appearances (e.g., BPMN) for visualizing timeaware processes or do not consider visualization issues at all.…”

Section: Related Workmentioning

confidence: 99%

“…Even if the minimum/maximum duration of each activity is known at build-time the actual duration will be only known at run-time after completing the activity. To address this, for each process activity, four time values are calculated based on the temporal information provided by the process schema [13,14]: earliest start time (EST), earliest finish time (EFT), latest start time (LST), and latest finish time (LFT). Note that these values are known from project planning techniques as well [18].…”

Section: Transforming Process Schemas To Gantt Chartsmentioning

confidence: 99%

Enabling Personalized Process Schedules with Time-Aware Process Views

Lanz

Kolb

Reichert

2013

Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications

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Summary. Companies increasingly adopt process-aware information systems (PAISs) to model, enact, monitor, and evolve their business processes. Although the proper handling of temporal constraints (e.g., deadlines and minimum time lags between activities) is crucial for many application domains, existing PAISs vary significantly regarding the support of the temporal perspective of a business process. In previous work, we introduced characteristic time patterns for specifying the temporal perspective of PAISs. However, time-aware process schemas might be complex and hard to understand for end-users. To enable their proper visualization, therefore, this paper introduces an approach for transforming time-aware process schemas into enhanced Gantt charts. Based on this, a method for creating personalized process schedules using process views is suggested. Overall, the presented approach enables users to easily understand and monitor time-aware processes in PAISs.

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“…Moreover, in many application areas (e.g., patient treatment, automotive engineering), the handling of temporal constraints is vital in order to successfully execute and complete processes [3,4,10]. However, contemporary process-aware information systems (PAIS) lack a comprehensive support of such time-aware processes [10].…”

Section: Introductionmentioning

confidence: 99%

Dealing with Changes of Time-Aware Processes

Lanz¹,

Reichert²

2014

Lecture Notes in Computer Science

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Abstract. The proper handling of temporal process constraints is crucial in many application domains. Contemporary process-aware information systems (PAIS), however, lack a sophisticated support of time-aware processes. As a particular challenge, the execution of time-aware processes needs to be flexible as time can neither be slowed down nor stopped. Hence, it should be possible to dynamically adapt time-aware process instances to cope with unforeseen events. In turn, when applying such dynamic changes, it must be re-ensured that the resulting process instances are temporally consistent; i.e., they still can be completed without violating any of their temporal constraints. This paper presents the ATAPIS framework which extends well established process change operations with temporal constraints. In particular, it provides pre-and post-conditions for these operations that guarantee for the temporal consistency of the changed process instances. Furthermore, we analyze the effects a change has on the temporal properties of a process instance. In this context, we provide a means to significantly reduce the complexity when applying multiple change operations. Respective optimizations will be crucial to properly support the temporal perspective in adaptive PAIS.

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Time Management in Workflow Systems

Cited by 97 publications

References 1 publication

Quality of service for workflows and web service processes

Quality of service for workflows and web service processes

Enabling Personalized Process Schedules with Time-Aware Process Views

Dealing with Changes of Time-Aware Processes

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