• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.692-697
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• 2006

건축물의 유지관리에 대한 중요성이 부각되고 건축물의 수명연장에 대해 많은 관심이 집중되고 있다. 최근 수도권을 중심으로 도심지 등의 주택용지가 부족함에 따라 해결책으로 주상복합건물의 건설이 빠른 속도로 증가하고 있다. 주상복합건물은 부지 내에서 토지이용의 극대화를 가져왔지만, 유지관리단계에서는 관리비용 분담과 관리범위 한계 등으로 인해 상가시설과 주거시설 이해당사자간에 갈등이 발생하는 등 많은 문제점을 내포하고 있다. 본 논문의 목적은 건축물의 초기성능을 유지하고 개선할 수 있도록 설계단계에서 유지관리성능 향상을 위한 체크리스를 제시하는 것이다. 이를 위해 문헌조사 및 설문조사를 실시하여 유지관리의 문제점을 도출하고 설계단계에서의 검토항목을 작성하여 건축계획분야를 중심으로 건축물의 유지관리성능 향상을 위한 가이드라인을 제시하였다. 본 연구결과는 건축물의 생애기간동안 사회적, 물리적, 기능적 변화 요구에 대응하여 유지관리 성능향상에 도움을 줄 것으로 기대된다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 C
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• pp.2153-2155
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• 2000

The not an organization a branch stream the maintenance factor class on a class and the roadway type for roadway lighting design, the facted an insufficiency maintenance factor to apply our the country conditions. The consideration of maintenance factors is not being fully applied for roadway lighting design in Korea. This paper consider optical characteristics and maintenance factors as well as LID of Luminaires in designing roadway lighting. Consideration of maintenance factors that are neme specified according to LDD(Luminaire Dirt Depreciation), LLD(Lamp Lumen Depreciation), AADT(Average Annual Daily Traffic) based on IESNA regulation. The analyzed optical characteristics are applied for stagger and cross roadway types with maintenance factors in the range of 0.51$\sim$1.00 and equipment factor of 0.9.

• Journal of Electrical Engineering and Technology
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• 제11권2호
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• pp.338-346
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• 2016

In order for the optimal solution of generators’ annual maintenance scheduling to be applicable to the actual power system it is crucial to incorporate the constraints related to the equivalent operation hours (EOHs) in the optimization model. However, most of the existing researches on the optimal maintenance scheduling are based on the assumption that the maintenances are to be performed periodically regardless of the operation hours. It is mainly because the computation time to calculate EOHs increases exponentially as the number of generators becomes larger. In this paper an efficient algorithm based on demand grouping method is proposed to calculate the approximate EOHs in an acceptable computation time. The method to calculate the approximate EOHs is incorporated into the optimization model for the maintenance scheduling with consideration on the EOHs of generators. The proposed method is successfully applied to the actual Korean power system and shows significant improvement when compared to the result of the maintenance scheduling algorithm without consideration on EOHs.

• 한국IT서비스학회지
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• 제14권3호
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• pp.67-84
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• 2015

Software is more diverse and complex and the level of importance for the maintenance of application software to securely operate software is also gradually increasing in proportion. The calculation method for maintenance cost of application software applied in Korea public enterprises is involved in the range of 10 to 15% of development cost, depending on the Software Project Cost Estimation Guide. Moreover, as most software maintenance cost estimation procedures do not take into consideration of the risk factors related of maintenance, it can be seen as a main cause for the occurrence of maintenance related accidents. This study proposes a maintenance cost estimate model that takes into consideration of the risks related to the software maintenance activities to improve and resolve issues arising from the estimation of maintenance cost. In doing so, maintenance risk factors are analyzed and a risk index is derived through the analysis of risk levels based on the risk factors. Based on such analysis, a maintenance cost estimate method which reflects the maintenance risk index was established.

• Communications for Statistical Applications and Methods
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• 제9권3호
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• pp.865-870
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• 2002

Burn-in is a widely used method to eliminate the initial failures. Preventive maintenance policy such as age replacement is often used in field operation. In this paper burn-in and maintenance policy are taken into consideration at the same time. The properties of the corresponding optimal burn-in times and optimal maintenance policy are discussed.

• 품질경영학회지
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• 제31권1호
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• pp.142-147
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• 2003

Burn-in is a widely used method to eliminate the initial failures. Preventive maintenance policy such as block replacement with minimal repair at failure is often used in field operation. In this, paper burn-in and maintenance policy are taken into consideration at the same time. The cost of a minimal repair is assumed to be a non-decreasing function of its age. The problems of determining optimal burn-in times and optimal maintenance policy are considered.

• 한국군사과학기술학회지
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• 제24권4호
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• pp.449-456
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• 2021

Impatience characteristics are an important factor to be considered in the defense field, which is sensitive to time, but there are not many cases applied. In addition, due to the difficulty of analysis that must consider various probabilistic factors (breakdown/maintenance distribution, impatience characteristics, etc.), military decision makers consider only simple data (number of occurrences per year, maintenance time, etc.) Therefore, in this study, a model capable of analyzing the performance of the emergency maintenance system for determining the appropriate size and organization of military and civilian maintenance personnel was presented in consideration of impatience characteristics and probabilistic factors. And through numerical analysis, the appropriate size of the military and civilian emergency maintenance teams was analyzed. This study is significant in that it can improve readiness of operational power and prevent waste of defense budget through efficient operation of the military's emergency maintenance system.

• 한국구조물진단유지관리공학회 논문집
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• 제13권1호통권53호
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• pp.59-68
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• 2009

파이핑에 의한 제방 사고의 원인은 설계과정에서 파이핑 현상에 대한 정확한 이해 없이 단순 적용되는 검토과정이 문제의 한 원인이 된다. 이에 본 연구는 사질토 지반에 가까운 제방단면에 sheet pile을 타입할 때 굴착면에서 기존의 파이핑 검토 방법들을 비교 분석하였다. Terzaghi 방법과 한계동수경사 방법에서 안전율은 각 방법에 따라 최대 2배의 차이를 보였다. 그리고 한계유속 방법은 설계인자를 어떻게 판정하느냐에 따라 큰 편차를 나타내었다. 결론적으로 기존의 파이핑 해석방법을 모든 지반 조건에 일률적으로 적용하기 보다는 지반 조건에 따라 각 해석방법이 가지는 특성을 이해하고 적용해야할 것이다.

• 한국통계학회:학술대회논문집
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• 한국통계학회 2002년도 추계 학술발표회 논문집
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• pp.147-151
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• 2002

Burn-in is a widely used method to eliminate initial failures. Preventive maintenance policy such as block replacement with minimal repair at failure is often used in field operation. In this paper burn-in and maintenance policy are taken into consideration at the same time. The cost of a minimal repair is assumed to be a non-decreasing function of its age. The problems of determining optimal burn-in times and optimal maintenance policy are considered.

• 한국관개배수논문집
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• 제16권1호
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• pp.11-19
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• 2009