• 한국소음진동공학회논문집
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• 제22권6호
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• pp.574-581
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• 2012

Condition-based maintenance(CBM) has been used as a useful concept for optimizing maintenance plan and decreasing maintenance cost in several kinds of plant sites. This study introduced an example that developed an integrated management system for maintenance parameters and hydraulic turbine of hydro-power plant in order to improve its maintenance strategy as applying CBM techinique. The integrated management system consists of three parts. One is a hardware part including PDA inspection system and several kind of precision measuring instruments. Another is a vibration monitoring system on hydraulic turbine. The other is a software part that takes charge of making hierarchy tree of maintenance parameters and their inspection route, managing accumulated database, assessing health condition of components, and supporting interface with other enterprise management system. The system has been installed at Chuncheon hydro-power plant for test and demonstration. It is expected that the system can contribute database construction for diagnostics and prognostics on facility health condition and systematic accumulation of know-how on operation and maintenance of plant.

• 대한산업공학회지
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• 제33권4호
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• pp.487-493
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• 2007

In this paper, we deal with an optimal software-release problem of determining the time to stop testing and release the software system to the user. The optimal release time problem is considered from maintenance like the periodic distribution of service packs and the unpredictable distribution of patches after the release. Moreover, the environment of software error-detection during operation differs from the environment during testing. This paper proposes the software reliability growth model which incorporates periodic service packs, unpredictable patches and operational environment. Based on the proposed model, we derive optimal release time to minimize total cost composed of fixing an error, testing and maintenance. Using numerical examples, optimal release time is determined and illustrated.

• 한국정보처리학회논문지
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• 제2권3호
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• pp.314-323
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• 1995

최근 소프트웨어에 대한 사용자의 이해가 높아짐에 따라 소프트웨어 개발자는 사 용자의 요구를 만족시키기 위해 더 많은 노력을 하게 되었다. 따라서 소프트워어는 규 모가 방대해지고 복잡해졌다. 그로인해 소프트웨어의 개발 및 유지보수 비용은 증가 되었고 개발자의 대다수는 유지보수에 투입되어 새로운 소프트웨어의 개발에 적체현 상을 가져오게 되었다. 유지보수성이 좋은 소프트웨어는 하나의 모듈에 하나의 기능 을 가지며 읽기 쉽고 복잡하지 않은 구조를 가져야 한다. 본 논문에서는 소프트웨어의 복잡성을 효과적으로 관리하기 위해 소스프로그램을 입력으로 하여 프로덕트 메트릭스 를 측정하고 요인항목들의 값을 산출하는 시스템을 설계하고 구현하였다.

• 한국콘텐츠학회논문지
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• 제2권4호
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• pp.59-66
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• 2002

정보화 사회가 고도화될수록 소프트웨어의 개발은 복잡해지고 대규모화되고 있다. 또한 소프트웨어의 라이프사이클 단축으로 개발기간의 단축이 절실하게 요구되고 있는 실정이며 개발된 소프트웨어의 생명주기도 짧아지고 있어 개발 및 유지보수가 더욱 어려워지고 있다. 이에 따라 소프트웨어의 개발에서 미리 구현된 컴포넌트를 사용하여 개발비용과 시간을 단축하려는 노력이 증가하고 있다. 컴포넌트 기술은 현재 매우 빠른 속도로 발전하고 있으며, 기존의 소프트웨어 개발 방법 뿐 아니라 웹 기반 시스템의 개발에도 큰 변화를 가져오고 있다. 본 논문에서는 CBD 기반의 웹 시스템의 개발을 위한 관련 기술을 살펴보고, 특히 중소규모의 웹 시스템 개발에 대한 적용을 위해 기존 컴포넌트 기술들을 비교 분석하여, 문제점을 도출하고 이를 바탕으로 컴포넌트를 기반으로 한 웹 시스템의 개발ㆍ활용의 효율성을 높이기 위한 방안을 제안하였다. 본 연구결과의 활용을 통해 CBD기반의 중소 규모 웹 시스템 구축에서 개발비용을 감소시키고 유지 관리의 부담을 경감시킬 수 있을 것으로 기대된다.

• Asia pacific journal of information systems
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• 제6권1호
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• pp.241-267
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• 1996

The problems like exceeding estimated cost, late due-date, expensive maintenance, insuffiency of experts and low productivity are becoming emphasized related with the software development. In order to overcome these problems and to develop the highly qualified software within the limited resources, a project management tool is used. The purpose of this study is to develop a conceptual model of the project management system which can plan, analyze and control the software development projects effectively. The model is constructed with plan and track management system, cost management system and operation management system for the efficient project management. It is named by LSD-PMS : Large-scale Software Development Project Management System. We reviewed 5 cases of project management. LSD-PMS is evaluated and reviewed by the project managers in the field. It is proved that LSD-PMS is a tool which can help project managers develop software successfully given budget and time schedule. In the future, this system should be further developed as an integrated model with system implementation tools such as CASE products.

• Journal of Information Technology Applications and Management
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• 제20권3호
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• pp.1-18
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• 2013

Software architecture is the blueprint for a software system and should provide consistent guidelines for design, implementation, and maintenance throughout the entire lifecycle of the system. Components, interactions between the components, well-formed structure, reasons, and various perspectives reflecting various stakeholders' concerns changing through the phases of software lifecycle are the key elements of software architecture. The architect identifies and engages the stakeholders, understands and captures stakeholder's concerns including those regarding life cycle, and lets the concerns reflected in the architecture. To do so, architect should take into consideration various contextual elements regarding the system too. We make an extended list of the elements, especially those of business application software architecture, that the architect should take into consideration and construct a model of the relationships between the elements.

• International Journal of Computer Science & Network Security
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• 제24권7호
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• pp.1-10
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• 2024

Software architecture are High-level design decisions shaping a software system's components, structure, and interactions. It can be a blueprint for development, evolution, and ongoing maintenance. This research investigates the communication practices employed by software architects and developers to ensure adherence to the designed software architecture. It explores the factors influencing the selection of follow-up methods and the impact of follow-up frequency on successful implementation. Findings reveal that formalized follow-up procedures are not yet a ubiquitous element within the software development lifecycle. While electronic communication, particularly email, appears to be the preferred method for both architects and developers, physical and online meetings are utilized less frequently. Interestingly, the study suggests a potential confidence gap, with architects expressing concerns about developers' ability to faithfully implement the architecture. This may lead to architects providing additional clarification. Conversely, while most developers reported confidence in their software knowledge, overly detailed architecture documentation may pose challenges, highlighting the need for architects to consider alternative communication strategies. A key limitation of this study is the sample size, restricting the generalizability of the conclusions. However, the research offers valuable preliminary insights into the communication practices employed for architecture implementation, paving the way for further investigation with a larger and more diverse participant pool.

• 한국전산구조공학회논문집
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• 제34권1호
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• pp.9-18
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• 2021

최근 건설시장에 4차 산업혁명기술의 급속한 확산과 도입, 적용이 트랜드로 부각되고 있다. BIM 기술은 4차 산업혁명 기술의 근간을 이루는 다차원 정보체계이다. 이러한 정보기반체계를 활용한 하천분야도 유지관리를 위한 현행화 방안 등 적극적인 연구검토가 되고 있다. 최근 하천 전문가들의 하천분야 BIM도입 효과에 필요성을 반영하여 적극적인 연구와 현행화 작업을 해야 된다. 그리고 첨단기술을 반영한 시설물 유지관리 정보체계를 활성화하고 관리계획 수립 및 운영을 위해서는 다양한 정보체계를 구축하기 위한 도구 및 지원소프트웨어의 개발이 반드시 필요할 것으로 전망된다. 하천시설의 유지운영을 위한 연구로 기본적으로 기존 도면자료를 이용하여 3차원 정보모델을 구축하고 이를 활용한 손상을 점검하고 정보화하며 보수보강을 위한 자료로 활용토록 하는 것이다. 이는 기존 도면방식에 없는 정보체계를 하천시설물을 3D 모델링과 함께 유지관리정보를 속성으로 구축하는 방법을 연구하여 유지운영을 위한 점검, 손상 관리를 보다 효과적이고 활용성이 높은 관리방안을 제시하고자 하였다.

• 전기학회논문지P
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• 제58권3호
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• pp.276-284
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• 2009

In this paper, we develop the image transfer remote maintenance monitoring system for hand held device which can compensate defects of human mistake. The human mistakes always happen when the worker communicate information each other to check and maintenance the equipment of the power plant under bad circumstance such as small place and long distance in power plant. A worker couldn't converse with other when in noisy place like Power plant. So, we make some hand device for handy size and able to converse in noisy place. The developed system can have improvement of productivity through increasing plant operation time. And developed system is composed of advanced H/W(hard ware) system and S/W(soft ware)system. The H/W system consist of media server unit, communication equipment with hand held device, portable camera, mike and head set. The advanced s/w system consist of data base system, client pc(personal computer) real time monitoring system which has server GUI(graphic user interface) program, wireless monitoring program and wire ethernet communication program. The client GUI program is composed of total solution program as pc camera program, and phonetic conversation program etc.. We analyzed the required items and investigated applicable part in the image transfer remote maintenance monitoring system with hand held device. Also we investigated linkage of communication protocol for developed prototype, developed software tool of two-way communication and realtime recording skill of voice with image. We confirmed the efficiency by the field test in preventive maintenance of plant power.

• 천문학논총
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• 제11권1호
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• pp.147-161
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• 1996

The development of universal CCD camera control software for all BOAO CCD camera systems is proposed. The new software, running under Sun SPARCstation and motif based X window system with SunOS 4.1.3 operating system, replaces existing control software based on NeXTstation color and NeXTstep 2.1 operating system which is no more produced now. Several new features of the new software is introduced, some of which are 1) the image contrast is enhanced by color manipulation and display, 2) image zooming and trimming, 3) any size of image can be displayed in the scrolled window, and 4) the offset between telescope pointing position and CCD center is easily calculated by alt-azi map. Along with the above new features, the new software has advantages including ease of maintenance and upgrading and elimination of risk caused by hardware damage. Since September 1, the software beta version is being used by observers and there is not seen severe problem regarding the software itself, but several requests to equip more features to the software will be mirrored to future release.