• Title/Summary/Keyword: 생애주기 관리

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The Research on the Curve of Maintenance Cost from Newly Constructed Steel Box Girder Bridge (최근 가설된 강상자형 교량의 보수.보강 공사비곡선 추정에 관한 연구)

  • Kim, Young-Woo;Shin, Yung-Seok
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2009.04a
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    • pp.553-556
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    • 2009
  • 최근 우리나라의 건설 분야에서는 생애주기비용(Life Cycle Cost;이하 LCC)/가치공학(Value Engineering; 이하 VE)을 적용한 구조물 설계가 실시되고 있다. 이는, 건설교통부에서 공공건설사업의 효율성을 제고하기 위하여 실시하고 있으며, 대통령령에 따라 "건설기술관리법시행령"을 제정하여 공공사업분 수행 절차와 기준을 법제화 하였으며 이후 시행령 38조 13의 "설계의 경제성등 검토" 실시를 의무화하는 시행지침을 작성하여 수행하고 있다. 이러한, LCC/VE의 검토에서 보수 보강 공사비 산정은 유지보수공사 프로파일링을 통한 보수 보강 시기를 산정(건설교통부, 2003)하여 교량 구성요소별 보수 교체 주기를 산정(건설교통부, 2001)에서 제시한 기간을 적용하여 LCC/VE를 평가하고 있다. 하지만, 이러한 보수 보강 공사비의 적용은 일괄적인 적용이며, 예전 국내의 교량 건설기술이 현재와 같이 발전된 상태에서의 현황이 아니므로 본 연구에서는 현재 고속국도에 완공되어 운용중인 교량 구조물을 시설물의 안전관리에 관한 특별법 시행령(2008)에 따른 "시설물의 안전점검 및 정밀안전진단 지침"에 의한 교량의 초기점검, 정밀점검 및 정밀안전진단 자료를 조사 분석하여 보수 보강 공사비 곡선을 추정하려 한다.

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Development of maintenance cost estimation method considering bridge performance changes (교량 성능변화를 고려한 유지관리비용 추계분석 방법 개발)

  • Sun, Jong-Wan;Lee, Huseok;Park, Kyung-Hoon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.12
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    • pp.717-724
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    • 2018
  • To prepare for the explosive increase in maintenance costs of bridges according to the aging of infrastructure, future maintenance costs of bridges should be predicted. For this purpose, the management status of bridges was investigated and modeled as the upper limit of the performance level and the target management level according to the life cycle. This paper proposes methodologies and procedures for estimating the bridge maintenance costs using two models and existing cost and performance prediction models that consist of unit repair cost model according to the safety score, performance degradation model of bridges, unit reconstruction cost, and average reconstruction time. To verify the applicability, future maintenance costs can be forecasted for specific management agency considering the number of bridges, degree of aging, and current management status. As a result, it is possible to obtain the maintenance cost and safety level of an individual bridge level for each year. In addition, by summing them up to the agency level, the average safety score, ratio of the safety level, inspection costs, repair costs, and reconstruction costs can be obtained. In a further study, the changes in maintenance costs can be analyzed according to the changes in the target management levels using the developed method. The optimal management level can be suggested by reviewing the results.

Development of an Economic Evaluation model for Coating System Based on Environmental Conditions of Power Generation Structure (발전구조물의 환경조건을 반영한 도장계 선정 경제성 평가 모델 개발)

  • Kim, In Tae;Lee, Su Young;An, Jin Hee;Kim, Chang Hak
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.40 no.1
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    • pp.77-85
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    • 2020
  • Currently, life-cycle cost analysis methods are introduced to maintain large infrastructure facilities in Korea. However, there are not many cases in which maintenance models are applied that reflect conditions such as the location of a facility and its surroundings. In order to establish an appropriate maintenance strategy, a cost prediction, deterioration model, and a decision model reflecting uncertainty should be established. In this study, an economic analysis model was developed for long-term cost planning and management based on user decisions based on maintenance methods and judgment criteria for painting specifications applied to power generation structures. The performance of the paintwork was assessed through the paint deterioration test for the application of the economic analysis model, and the results of the economic analysis according to the applied paint specifications (Urethan, polysiloxane, fluorine) were verified by applying the proposed economic analysis model. In this study, it is believed that the selection of the repair cycle and evaluation methods applied with the development model rather than the performance of the painting can be expected to be used as basic data for the maintenance cycle, even if it is not limited to the painting.

An Uncertainty Analysis of Calculating Life Cycle Maintenance and Energy Costs for Technical Proposals (기술제안입찰을 위한 유지관리 및 에너지 비용 산출방식의 불확실성 분석)

  • Chung, Sung Young;Kim, Sean Hay
    • Korean Journal of Construction Engineering and Management
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    • v.19 no.5
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    • pp.3-9
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    • 2018
  • Although Life Cycle Cost (LCC) must be evaluated by experts, sometimes it may not allow a sufficient time for even the experienced LCC expert to make rational decisions. Therefore, it often ends with relatively comparing the final numbers. We have broken down 110 technical proposals that are actually bade and accepted for large construction projects, and then have analyzed the uncertainty of Maintenance and Energy (M&E) cost during building life cycle, which turns out be the most volatile factor in uncertainty of LCC. Also we suggest "Value Engineering Index (VEI)" - the reduced M&E cost that is normalized by the reduced first cost. It is analyzed that the most uncertain factors of the M&E cost include repair and replacement term differing from each project, duplicated repair and replacement, non-standard repair items, and site-specific energy cost. Eventually we propose a VEI population with a mean of 1.38 and a standard deviation of 1.19, which is obtained by individually and exclusively applying the uncertain factors of the M&E cost to the 35 standard sample of technical proposals. The LCC evaluators may be able to use the VEI population as the benchmark to select the technical proposal with the most reasonable LCC among many others in two suggested manners; the one is to deterministically calculate the probability of single VEIs, and the other is to stochastically calculate the probability of the VEIs where uncertainty is quantified.

A Study on Application Methodology of SPDL Based on IEC 62443 Applicable to SME Environment (중소기업환경에서 적용 가능한 IEC 62443 기반의 개발 보안 생애주기 프로세스 적용 방안 연구)

  • Jin, Jung Ha;Park, SangSeon;Kim, Jun Tae;Han, Keunhee
    • KIPS Transactions on Computer and Communication Systems
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    • v.11 no.6
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    • pp.193-204
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    • 2022
  • In a smart factory environment in a small and medium-sized enterprise (SME) environment, sensors and actuators operating on actual manufacturing lines, programmable logic controllers (PLCs) to manage them, human-machine interface (HMI) to control and manage such PLCs, and consists of operational technology server to manage PLCs and HMI again. PLC and HMI, which are in charge of control automation, perform direct connection with OT servers, application systems for factory operation, robots for on-site automation, and production facilities, so the development of security technology in a smart factory environment is demanded. However, smart factories in the SME environment are often composed of systems that used to operate in closed environments in the past, so there exist a vulnerable part to security in the current environment where they operate in conjunction with the outside through the Internet. In order to achieve the internalization of smart factory security in this SME environment, it is necessary to establish a process according to the IEC 62443-4-1 Secure Product Development Life cycle at the stage of smart factory SW and HW development. In addition, it is necessary to introduce a suitable development methodology that considers IEC 62443-4-2 Component security requirements and IEC 62443-3 System security requirements. Therefore, this paper proposes an application plan for the IEC 62443 based development security process to provide security internalization to smart factories in an SME environment.

Developing a Program Performance Management Framework for Mixed-use Development in Urban Regeneration Projects (입체복합공간 개발사업의 프로그램 성과관리 체계 구축)

  • Lee, Kang-Wook;Hong, Hwa-Uk;Park, Hee-Dae;Han, Seung-Heon
    • Korean Journal of Construction Engineering and Management
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    • v.12 no.1
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    • pp.141-152
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    • 2011
  • The market volume of urban regeneration projects has steadily increased, thereby mixed-use development also shows significant market growth. However, previous researches on urban regeneration mainly deduced suggestions and plans for institution improvement based on comparison between projects implemented the inside and outside of the country. Whereas, researches on project management closely related to project success were limited, particularly in performance management. Accordingly, this research aims at developing a program performance management framework for public clients so as to succeed mixed-use development projects. Through extensive literature review and expert interview, this research developed performance indices for diverse facilities, risk management framework and integrating method of program performance score. The proposed framework is able to consider total life cycle from basic planning to maintenance phase and to check real-time performance level. Moreover, risk management framework can periodically assess and control the level of inherent risks within performance indices. The results can contribute to improve existing performance management practices and be basis for a web-based system developed in future.

A Models of Economic Analysis in Safety Diagnosis for Remodeling Strategies of Apartment Housing (공동주택의 리모델링 전략을 위한 안전진단의 경제성분석 모델)

  • Seo Kwang-Jun;Choi Mi-Ra;Shin Nam-Soo
    • Korean Journal of Construction Engineering and Management
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    • v.6 no.4 s.26
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    • pp.164-171
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    • 2005
  • The importance of the life cycle cost analysis(LCCA) for apartment housing remodeling projects has been fully recognized over the last decade. Accordingly theoretical models, guidelines, and supporting software systems were developed for the life cycle cost analysis of apartment housing remodeling systems. However, the level of consensus on LCCA results is still low due to the lack of reliable data on remodeling activities for safety diagnosis. in order to predict the reliability based LCCA of the given case, suggested the remodeling strategies level after reviewing other related materials. Apply the real information of the economic index. And based on such analytical measures, remodeling and operation cost and LCC in remodeling strategies level have been predicted; suggests the basic information about remodeling interventions level for the apartment housing. The LCC analysis models and the fuzzy logic based safety assessment presented in this study can greatly contribute to the value-oriented design alternative selection, estimation of the economic analysis, and the allocation of budget for apartm.

The Development of Life Cycle Cost Evaluation Index for Public Facilities (공공시설물의 생애주기비용 평가기준 개발)

  • Kim, Tae-Hui;Gu, Bon-Hak;Kim, Ok-Gyu;Park, Tae-Keun;Lee, Hyun-Soo
    • Korean Journal of Construction Engineering and Management
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    • v.9 no.6
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    • pp.216-224
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    • 2008
  • Recently, most developed countries use the evaluation system about Life Cycle Cost(LCC), and KOREA is beginning to introduce the system to reduce construction expenses. And the introduction of "Technical Proposal Type Bid", which is a new procurement method of Korea government, has made needs for the price-valuation way to evaluate facilities LCC. These days, LCC has been being evaluated by BTL and turnkey project in KOREA, which is suffering from difficulties in evaluating it, because evaluation elements and standards are vague. In addition, LCC evaluation in public construction business except BTL and turnkey is not carried out. Therefore, this paper is to develop a new evaluation index to evaluate LCC both systematically and objectively. The results of this paper are as followings. (1) Necessity and problem analysis of LCC evaluation index, (2) LCC evaluation index deduction from the technical report and question analysis, (3) Application and evaluation method suggestion to practice.

A Study on the Improvement Plans of the Humanities and Social Sciences Research Data Archives in Korea (국내 인문사회 연구데이터 아카이브의 개선방안에 관한 연구)

  • Shin, Young-Ran;Chung, Yeon-Kyoung
    • Journal of Korean Society of Archives and Records Management
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    • v.12 no.3
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    • pp.93-115
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    • 2012
  • This study aims to propose improvement plans of the Humanities and Social Sciences research data archives in Korea. For this purpose, literature reviews were conducted to prove the importance of the Humanities and Social Sciences research data and establish a theoretical basis for the concept and requirements of data archives. In addition, analysis of the Korean Research Memory (KRM), case surveys for a total of 9 domestic and international archives, and in-depth interviews with a total of 10 researchers in the field of the Humanities and Social Sciences were conducted as well. As for the improvement of the Humanities and Social Sciences research data archives in Korea, establishing a cooperative system between the National Research Foundation of Korea (NRF) and the field of the Humanities and Social Sciences was proposed first for data archives of each project. Secondly, a conceptual model of research data archives was designed in such a way that the archives would perform according to a life cycle of research data in the cooperative system, all based on data curation.

Literature Review on the Stress Management Programs throughout Life - span: By foreign research for 1993-1996 (생애주기에 따른 스트레스 관리 프로그램에 대한 고찰 -1993년부터 1996년까지의 외국문헌을 중심으로-)

  • Yun, Soon-Nyoung;Choi, Jeang-Sook;Lee, Kyung-Sook
    • Research in Community and Public Health Nursing
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    • v.8 no.2
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    • pp.178-196
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    • 1997
  • The purpose of this study is to identify the kind, the frequency, and the type of Stress Management Program(SMPs) throughout life-span used foreign, recent research. The period of this study was from July 1 to Dec. 10, 1997. The data were collected through Medline using two concepts: stress management programs and life-span. The number of these research were 106 and thirty-one experimental researches that were tested the effectiveness of SMPs throughout life span were selected. The data were analysed by the kind, frequency, and life-span. The results were as follows: 1. The kind and frequency of SMP : The total number of the kind of SMP were twenty-two. The most used SMP was relaxation therapy, 22 out of 31. The second biofeedback was 10, the third, cognitive behavior program was 9, the fourth, nutrition and diet, and education were 7. The others were coping skill(4), cognitive therapy(4), breathing(4), imagery(3), autogenic training(3), sleep and rest(2), meditation(2), information(2), desensitization(2), hypnosis(2), behavior therapy(1), time management (1), visualization(I), yoga(I), diversion(1), and problem solving skill. 2. Throughout life-span: Most SMPs were applied to adolescents, young adults, and middle-adults. Other subjects could not be found under the schooler. 3. The type of SMPs : 28(90.3%) out of 31 research used combined-SMP : two-combined SMP, 5: three-combined SMP, twelve: four-combined SMP, seven: five-combined SMP. 4. Afterward, further study such as meta-analysis are needed in order to identify effective ness of the SMPs.

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