• Title, Summary, Keyword: LCC

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A Study on the Development of Life Cycle Cost Database in Building (건축물의 LCC Database 구축에 관한 연구)

  • Jeon Chan-Min;Woo Kyung-Hun;Kim Joong-Hun;Kim Kyung-UP;Park Tae-Keun
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.537-540
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    • 2003
  • The importance of LCC analysis has been enlarged. Also, it would be necessary to computerize LCC analysis for accurate and logical analysis of LCC. In other papers, they showed LCC analysis model but the study of database development which could be applied in LCC analysis have been undeveloped. As a result, the final goal of this study is to develope LCC database. And this progress is devided 4 steps as design, construction, maintenance and disposal and derived the detailed cost item in the progresses. Futhermore, it would be possible to develope cost DB, fluent DB, general DB, building section DB, material DB and to propose database which would be applied in accurate and logical analysis of LCC.

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Life Cycle Costing for HVAC Systems through Case Studies of Domestic Construction Projects (사례분석을 통한 공조설비 LCC분석 개선방안)

  • Yang Hee-Chan;Lee Seung-Hoon;Hyun Chang-Taek
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.279-282
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    • 2002
  • 최근 건설사업시장의 개방과 건설사업관리제도(이하CM)의 도입으로 국내 건설업계 및 생산시스템에도 많은 변화가 일어나고 있다. 이에 따라, 건축물의 초기시설비는 물론 유지관리 및 최종 폐기단계까지의 비용을 종합적으로 고려한 건물생애주기비용(이하 LCC)에 대한 중요성이 증대되었으며 특히 기계장치의 유지관리비 중 많은 부분을 차지하는 공기조화시설 부문에서 LCC가 주로 검토되고 있다. 그러나 국내에서는 공기조화 설비의 LCC에 대한 절차 및 기준 등이 미비하여 효과적인 LCC분석이 이루어지지 않고 있다. 본 연구는 최근 수행된 국내 공기조화 설비분야의 LCC분석 사례를 조사하여, 국내 공조설비의 LCC분석의 문제점을 분석하였다. 또한 사례 분석을 중심으로 공조설비의 LCC분석 절차를 제시하고 이 절차에 따라 7개의 사례를 비교분석하였다. 그 결과, LCC측면에서 최적 대안을 선정하는 경우 각 대안 별로 뚜렷한 차이를 보이고 있는 에너지비용과 초기투자비를 주된 비용요소로 고려하는 것이 가장 효과적인 것으로 나타났다.

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Practices in VE/LCC based Design of Harbor Structures (VE/LCC기법의 항만구조물 설계적용 사례분석연구)

  • Yoon, Gil-Lim;Kang, Oh-Ram;Kim, Dong-Hyawn
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.20 no.4
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    • pp.390-400
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    • 2008
  • Reports on VE/LCC based coastal structural design were analyzed to derive possible improvement. VE/LCC technique may be effectively applied to making decisions in coastal structural design. However, it has not been well utilized in recent projects for some problems. Therefore, recent project reports on VE/LCC have been analyzed and merits and demerits were classified. Then, the reason why VE/LCC cannot be effectively applied to real projects was drived. Finally, some pre-requisites to improve the technique were summarized.

A Methodology on Estimating the Product Life Cycle Cost using Artificial Neural Networks in the Conceptual Design Phase (개념 설계 단계에서 인공 신경망을 이용한 제품의 Life Cycle Cost평가 방법론)

  • 서광규;박지형
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.9
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    • pp.85-94
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    • 2004
  • As over 70% of the total life cycle cost (LCC) of a product is committed at the early design stage, designers are in an important position to substantially reduce the LCC of the products they design by giving due to life cycle implications of their design decisions. During early design stages, there may be competing concepts with dramatic differences. In addition, the detailed information is scarce and decisions must be made quickly. Thus, both the overhead in developing parametric LCC models fur a wide range of concepts, and the lack of detailed information make the application of traditional LCC models impractical. A different approach is needed, because a traditional LCC method is to be incorporated in the very early design stages. This paper explores an approximate method for providing the preliminary LCC, Learning algorithms trained to use the known characteristics of existing products might allow the LCC of new products to be approximated quickly during the conceptual design phase without the overhead of defining new LCC models. Artificial neural networks are trained to generalize product attributes and LCC data from pre-existing LCC studies. Then the product designers query the trained artificial model with new high-level product attribute data to quickly obtain an LCC for a new product concept. Foundations fur the learning LCC approach are established, and then an application is provided.

Characteristics of (Ca,Sr)-doped LaCrO3 Coating Layer for Ceramic Interconnect of Solid Oxide Fuel Cell (고체산화물 연료전지용 (Ca,Sr)도핑된 LaCrO3계 세라믹 연결재 코팅층의 특성 연구)

  • Lee, Gil-Yong;Peck, Dong-Hyun;Song, Rak-Hyun
    • Journal of the Korean Electrochemical Society
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    • v.8 no.4
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    • pp.162-167
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    • 2005
  • Using Pechini method, we synthesized the $La_{0.6}Ca_{0.41}CrO_3$ (LCC41) and $La_{0.8}Sr_{0.05}Ca_{0.15}CrO_3$ (LSCC) powders for slurry dip coating, and $La_{0.75}Ca_{0.27}CrO_3$ (LCC27) powder for air plasma spray coating. The sintering property of the powders and their coating properties were investigated. The average particle sizes of the LCC41, LSCC, LCC27 were 0.6, 0.9, $1.5{\mu}m$, respectively. The relative density of LCC41 bulk was to be found about 98%. The LSCC coating on anode support prevented Ca migration of the coated LCC41 on the anode some or less, which was confirmed from EDS result. The air plasma spray-coated LCC27 with the dip-coated LCC41 were more dense and showed better electrical conductivity than those of the air plasma spray-coated LCC27 and the dip-coated LSCC and LSCC41. The LCC41 and LCC27 showed good electrical conductivities, but the LSCC had a poor electrical conductivity probably due to low sinterability

Life Cycle Cost Evaluation Index Enhancing of Public Facilities (공공시설물의 LCC 평가기준 개선방안)

  • Gu, Bon-Hak;Kim, Tae-Hui;Kim, Ok-Gyu;Park, Tae-Keun;Lee, Hyun-Soo
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.412-415
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    • 2007
  • Recently advanced nations utilize evaluation system about LCC, and KOREA begin to introduce the system to reduce construction expense. And Introducing "Technical proposal type bid" that is new government construction order mode made needs for valuation of price to evaluate facilities LCC. These days LCC is evaluated by BTL and turnkey project in KOREA, but it is suffering from difficulty in evaluation. because evaluation element and standard are indefinite. In addition LCC evaluation of public construction business except BTL and turnkey is not consisting. Therefore, in this research we present LCC evaluation Index for systematic and objective evaluation.

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The development of LCC evaluation tool on Excel Base (엑셀 기반의 LCC 평가도구 개발)

  • Chung, Kwang-Woo;Kim, Chul-Su;An, Joon-Yong;Chung, Jong-Duk
    • Proceedings of the KSR Conference
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    • pp.1630-1641
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    • 2010
  • LCC can be defined as "the sum of present values of investment costs, capital costs, installation costs, energy costs, operating costs, maintenance costs, and disposal costs over the life-time of the project, product, or measure." LCCA involves estimating the costs and timing associated with each alternative over a selected analysis period and conversion of those costs to economically comparable values considering the time-value of money. The several Excel-Based LCC tools found on the internet are described in this paper. Also, This paper performed an analysis of the existing LCC commercial tools, assessing various aspects of each program. The goal was to evaluate the best features of each tool and to identify the requirements for LCC evaluation of Urban Transit Vehicle. The LCC tools are developed to address problems in many different areas and a tool developed and structured for one area cannot generally be used in another area. No general LCC tool exists and if one is needed for Urban Transit Vehicle it has to be developed by the project. Since a full LCC can be very complex it is likely that this Excel-Based LCC tool should be a small and simple tool for quick cost estimates. This paper presents a LCC tool consisting of eight excel sheets, which are "Project", "CBS", "PBS", "PM", "CM", "Others", "LCC Result" and "Diagram".

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A Life Cycle Cost Case Analysis on the Build-Transfer-Lease(BTL) Projects of School (학교 임대형민자사업(BTL)의 LCC 사례 분석)

  • Cho, Seung-Yun;Ahn, Jang-Won;Kim, Yong-Su
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.145-150
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    • 2007
  • This study is a LCC case analysis on the school one of the BTL projects which is constructed by private organizations and rented to government. According to the RFP to make out documents, it is performed the case analysis based on the results of LCC calculation about maintenance & conservation costs; repairing costs and replacement costs. It is analyzed LCC on maintenance & conservation costs for 20 years(rent period) and 65 years(life cycle). As a result of LCC analysis, about more than 50% of total LCC are architectural works and the rest of them are machinery works, electric works, and civil works in the order. And it is also suggested some problems and their solutions to perform LCC analysis on the current BTL projects of school.

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Application of Generally Annual Maintenance Concept for LCC Analysis with a Highway (고속도로 LCC분석시 연간일상유지관리 개념의 적용)

  • Heo, In;Lee, Yong-Gu;Yang, Jae-Gyeong;Choe, Yeong-Min;Kim, Seung-Hyeon
    • Construction Engineering and Management
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    • v.12 no.5
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    • pp.43-54
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    • 2011
  • LCC(Life Cycle Cost) analysis on design process has to be performed for a selection of reasonable and economical design alternatives in highway construction projects. To be performed of LCC analysis, the maintenance data such that are maintenance periods, rate of repair, maintenance cost, and so on are required. Therefore the Hi-Portal System had been developed and the maintenance data has been accumulating in the Korean Expressway Corporation. However, the data are not effectively used because the system have no consideration for LCC concept, and currently, th data are acquired by survey with experts. In the study, it is proposed that the concept of Generally Annual Maintenance are practically and easily used to perform LCC analysis. Some of generally annual maintenance data are suggested through Hi-portal data analysis due to the proposed concept and LCC analysis of a real highway construction project is preformed by comparison with a current approach. From the results, it make sure that the proposed concept are effectively used to preform LCC analysis until during exactly practical data from Hi-Portal system are obtained.

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.