• Journal of Internet Computing and Services
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• v.10 no.6
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• pp.205-217
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• 2009

Recently, many organizations such as companies or institutions have demanded induction of very large-scale workflow management system in order to process a large number of business-instances. Workflow vendors have focused on physical extension of workflow engines based on device-level clustering, so as to provide very large-scale workflow services. Performance improvement of workflow engine by simple physical-connection among computer systems which don't consider logical-level software architecture leads to wastes of time or cost for construction of very large-scale workflow service environment. In this paper, we propose workcase-based workflow architecture and implement a very large-scale workflow management system based on the architecture. We prove that software architectures to be applied on a workflow engine have an effect on scalability and performance through workcase response-time evaluation of our proposed system.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.29 no.1
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• pp.1-8
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• 2006

This paper proposes a real-time resource allocation algorithm for minimizing the completion time of overall workflow process. The jobs in a workflow process are interrelated through the precedence graph including Sequence, AND, OR and Loop control structure. A resource should be allocated for the processing of each job, and the required processing time of the job can be varied by the resource allocation decision. Each resource has several inherent restrictions such as the functional, geographical, positional and other operational characteristics. The algorithm suggested in this paper selects an effective resource for each job by considering the precedence constraint and the resource characteristics such as processing time and the inherent restrictions. To investigate the performance of the proposed algorithm, several numerical tests are performed for four different workflow graphs including standard, parallel and two series-parallel structures. In the tests, the solutions by the proposed algorithm are compared with random and optimal solutions which are obtained by a random selection rule and a full enumeration method respectively.

• The Journal of Society for e-Business Studies
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• v.8 no.3
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• pp.87-105
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• 2003

Business Process Management (BPM) is an emerging trend of managing business process life cycles and integrating heterogeneous systems . Recently, BPM is considered as an essential element for automation of complex business processes involving many companies, particularly for those in an e-Business environment. In such an environment, it is very important for each business partner to trace history of resources. However, it has been a difficult problem for Workflow Management Systems(WFMSs) to support management of resource changes because of limited storage, complex process structure, and absence of formal change model. In this paper. a new framework is proposed, which can support change management for documents, one of core resources of business process. Under a traditional WFMSs framework, all workflow components belong to either build-time or run-time function, and executions of workflow processes are performed by the two functions . To manage changes of documents while process executing. a new framework with additional component modules are required. A version control method is introduced for the purpose of managing document changes. The proposed method includes five models for document structure, process structure, association between process and document, version management, and efficient version storage. A prototype system is developed to demonstrate the effectiveness of the proposed models.

• The KIPS Transactions:PartD
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• v.14D no.1 s.111
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• pp.97-106
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• 2007

In this paper, the business process was easily modeled by distinguishing between the business process and work logic. Based on this model, B2Bi collaboration Workflow modeling tool, which facilitates collaboration, was designed and implemented. The collaboration workflow modeling tool consists of 3 components; business process modeling tool, execution engine and monitoring tool. First, a business process modeling tool is used to build a process map that reflects the business logic of an application in a quick and accurate manner. Second an execution engine provides a real-time execution environment for business process instance. Third, a monitoring tool provides a real-time monitoring function for the business process that is in operation at the time. In addition to this, it supports flexibility and expandability based on XML and J2EE for the linkage with the legacy system that was used previously, and suggests a solution for a new corporate strategy and operation.

• Journal of KIISE:Software and Applications
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• v.29 no.9
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• pp.619-630
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• 2002

The various software engineering techniques have been come out in order to cope with the software crisis since 1980's. The software Engineering has focused on the process of software component development. The process products a development guide for a quality and productive improvement of software. But, most of the methodologies assume that a new system will be constructed and reused in the future. these do not actually support efficiently how we reuse legacy system's resources and construct a new system. In this paper, we present an efficient Reengineering Process for reusing legacy systems, RUP+re, which extends and customizes RUP. Rup+re consists of Reverse Engineering Workflow, Re-Engineering Workflow and forward Engineering Process. We describe RUP+re's workflows with their own detail steps and verify them practically through the case study. So, we provide efficient guidelines to the software Reengineering process construction which reuses the resources of a legacy system.

• Journal of the Korea Computer Industry Society
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• v.5 no.1
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• pp.19-28
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• 2004

The major problems in workflow system which controls business process arise with the difficulty of managing a vast volume of data. In this paper, a more reasonable method to manage workflow data is proposed after analyzing the data being used in workflow system. The data used in workflow system can be classified to model data, control data, workitem data and relevant data. The prime accent is placed on the workflow model data, as the model data is normally consistent and referenced more frequently that if the data is used efficiently, it is anticipated to give a good performance to workflow system. Relying on an intensive study, this paper designs and develops a model data system. This model data system is based on memory and manages versions, consistency, dynamic modification, and etc

• Journal of the Korea Society of Computer and Information
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• v.8 no.3
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• pp.16-25
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• 2003

Modeller is defined as the office work procedures(business processes), and that is systemically based upon the real-time collaborative operations by a set of actors, which is called group. This paper describes the design of the ICN editor that is operable under the real-time collaborative computing environment. We use the database agent that enables the ICN editor to operate among multiple actors(group) through the event-driven collaboration platform. Consequently, a set of workflow and business processes defined through this editor is not only stored onto database but also transformed into the format of the workflow process definition language(WPDL) that is a standardized worflow description and specification language proposed by the workflow management coalition(WfMC). This method can improve the performance of workflow processing by minimizing the workflow execution cost occurred during workflow definition.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2001.06a
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• pp.445-454
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• 2001

A workflow model is useful fur business process analysis and has often been implemented for office automation through information technology. Accordingly, the results of workflow modeling need to be systematically managed as information assets. In order to manage the modeling process effectively, it is necessary to enhance the efficiency of their reuse. Therefore, this paper creates a Document-barred Workflow Modeling Support System (DWMSS) using a case-based reasoning (CBR) approach. It proposes a system architecture, and the corresponding modeling process is developed. Furthermore, a repository, which consists of a case base and vocabulary base, is built. A carte study is illustrated to demonstrate the usefulness of th is system.

• The Journal of Society for e-Business Studies
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• v.9 no.1
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• pp.197-208
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• 2004

As the structure of an enterprise becomes complicated and distributed, the interoperability between workflow systems for the process automation among partners or departments is rising as an important issue. For the interoperability between workflow systems, we propose a data exchange scenario based on mobile agents. The scenario includes sequence diagrams and methods defined by UML. The mobile agents are designed based on the mobile agent standard, MASIF, developed by OMG. In order to prove the applicability of the mobile agent technology to workflow interoperability, we have developed a prototype function which creates and transfers mobile agents.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.115-117
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• 2003

최근 급변하게 발전하는 인터넷 기술에 따라 이를 이용한 워크플로우 시스템에 대한 관심이 높아지고 있다. 이러한 관심은 기업 내부의 워크플로우 시스템뿐만 아니라 서로 다른 기업간 워크플로우 시스템의 상호운용성을 위한 Inter-Workflow 시스템으로 확대되고 있다. 본 논문에서는 WfMC에서 제청한 Workflow Management Coalition의 표준 명세서 WfMC참조 모델 중 인터페이스 4에 해당하는 서로 다른 워크플로우 엔진과 상호운용 메커니즘에 대해서 논한다. 서로 다른 조직의 워크플로우 엔진간의 상호운용성을 위해 Wf-XML 메시지 전송방식을 사용하며 chained process과 nested sub-process 상호운용성 모델을 지원하는 Inter-Workflow 시스템을 제안한다.