• Title/Summary/Keyword: LCC기법

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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 Study of on the Case Study of LCC Analysis for the Education and Research Building of S University (S대학교 교육연구동 LCC분석 사례 연구)

  • Seo Min-Gu;Ha Han-Ki;Park Tae-Keun
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.329-332
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    • 2003
  • The Ministry of Construction and Transportation has estimated the reconsideration of economy in construction and the dullness of LCC forcast method which supports decision-marking in safety and maintenance of buildings. So, they have introduced LCC analysis method in steps of a feasibility study and design. Because of the introduction of LCC analysis process and method, it would be possible to make a logical decision from management maintenance, estimation, user point of view. In this study, it would bepossible to show a plan and alternative of design factors and structure in one building by using LCC analysis method and to compare and analyze the reduction of life circle cost bi the elapsed time.

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Report on VE & LCC (Value Engineering, Life Cycle Cost) Technics Introduction about the Electric Power Equipment (전력시설물에 대한 VE 와 LCC기법 도입에 관한 연구)

  • 김상직;장우진
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2003.11a
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    • pp.81-86
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    • 2003
  • Recently the introduction of VE & LCC techniques for large size electric power facilities be achieved in various kinds form, of and tends to evaluate to the beginning investment cost when think about cost of electric power facilities usually, but must consider all life cycle cost (maintenance cost, repair cost, improvement cost, operation cost, electric power cost etc.). This treatise applies design techniques that consider copper loss related by voltage drop at power supply of long distance in trunk design and all life cycle cost techniques

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A study on the improvement in decision making analysis for the selection of tunnel construction method (터널건설공법 선정을 위한 의사결정기법의 개선방안 연구)

  • Park, Jun-Kyung;Jun, Sung-Kwon;Kim, Young-Keun;Heo, Eun-Nyeong
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.4 no.4
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    • pp.261-276
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    • 2002
  • Recently, for the purpose of choosing reasonable and economical construction, the decision making analyses, such as VE (Value Engineering) and LCC (Life Cycle Cost), are generally performed. But, these methods have some limitations for the application to subway tunnel construction method. So, the AHP (Analytical Hierarchy Process) analysis is applied to determine relative importance for obtaining objectivity in quantitative analysis. And, the LCSC (Life Cycle Social Cost) method is developed to account for the social loss and risk by tunnel construction. From the case of the subway ${\bigcirc}{\bigcirc}$ lot, those methods are very useful to decision making analysis. And, in that case, both quantitative and quantitative analysis appraisement, the drilling and blasting method is evaluated useful alternative proposal in comparing with the cut and cover method.

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Economic Analysis of Insulation Wall Panel System using LCC Method (LCC기법을 활용한 단열외벽패널시스템의 경제성분석)

  • Kim, Min-Woo;Jeon, Kyu-Nam;Lee, Gun-Cheol;Cho, Byoung-Young;Han, Min-Cheol;Han, Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2011.05a
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    • pp.153-155
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    • 2011
  • In this study, an insulation panel system that has the most excellent economic feasibility in a long term LCC viewpoint in some analysis, which determine a proper insulation panel construction method for the out wall of structures, is analyzed. As a result, in the case of a deterministic LCC analysis, the initial investment cost represents about 80,000Won/㎡ for extrusion ceramic panels. Also, although the costs of maintenance, disassembling, and disposal show no large differences compared with other panel systems, metal panels indicate a bit higher than other panel systems about 1.5 times. In the probability density function that analyzes the variation of the probabilistic cost between panel systems and its economic feasibility, metal panels show the highest cost distribution and extrusion and stone panels represent low cost distributions. In the cumulative function distribution that composites probability density functions, the extrusion ceramic panel represents the most excellent economic feasibility and reliability and that is also the most superior subject among the subjects used in this study.

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The Life Cycle Cost Optimization Methodology as a Tool for Designing Apartment Units (공동주택 단위세대의 생애 비용 최적화 방법론 연구)

  • Park Tae Keun
    • Korean Journal of Construction Engineering and Management
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    • v.1 no.1 s.1
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    • pp.80-86
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    • 2000
  • The future costs of energy and the cost of the repair of apartment buildings are expected to rise continuously in proportion to the initial costs. Therefore it has become important for these increasing costs to be incorporated and reflected in the design of the building. Systems such as structure and services for the buildings remain constant, but a number of the walls and windows can vary and thus have a major influence on the total construction and running costs of a building. The critical factor in the apartment unit design for the optimization of life cycle cost (LCC) is the ratio of the x and y axis of the walls in the unit plan. This paper demonstrates how to achieve the optimal size and thus optimize the LCC of the building.

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A Case Study on the Economic Analysis for an Advanced Technology-Based HYAC System Using LCC Technique (LCC 기법을 이용한 신기술 냉 $\cdot$ 난방 공조설비 시스템의 경제성 분석에 관한 사례연구)

  • Kim Yong-Su;Hwang Seong-Su
    • Korean Journal of Construction Engineering and Management
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    • v.6 no.2 s.24
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    • pp.129-138
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    • 2005
  • The purpose of this study is to assess economic effects for an advanced technology-based HVAC system. The study has been performed using LCC technique for the economic analysis. Data for LCC analysis are collected from estimation and interview of estimators and maintenance experts of buildings. Based on the LCC analysis, the economic effect of a new HVAC system has been predicted as follows : for the investment during 15 years of study period, (1) $21.6\%$ of LCC saving is predicted, (2) return rate for the investment is 4.8 times in case of new construction, and 14.4 times in case of building remodelling.

A Case Study on the Economic Analysis for a New Technology-Based Ventilation System Using LCC Technique (LCC기법을 이용한 신기술 환기시스템의 경제성 분석에 관한 사례연구)

  • Choi, Hyun-Keun;Hwang, Seong-Su;Kim, Yong-Su
    • Journal of the Korea Institute of Building Construction
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    • v.4 no.4
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    • pp.143-150
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    • 2004
  • The purpose of this study is to assess economic effects for a new technology-based ventilation system. The study has been performed using LCC technique for the economic analysis. Data for LCC analysis are collected from estimation and interview of estimators and maintenance experts of buildings. Based on the LCC analysis, the economic effect of a new technology-based ventilation system has been predicted as follows: for the investment during 15 years of study period, (1) return rate for the investment is 9.3 times. (2) 7.3% of LCC saving is predicted.

Development of a Successive LCC Model for Marine RC Structures Exposed to Chloride Attack on the Basis of Bayesian Approach (베이지안 기법을 이용한 해양 RC 구조물의 염해에 대한 LCC 모델 개발)

  • Jung, Hyun-Jun;Park, Heung-Min;Kong, Jung-Sik;Zi, Goang-Seup;Kim, Gyu-Seon
    • Journal of the Korea Concrete Institute
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    • v.21 no.3
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    • pp.359-366
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    • 2009
  • A new life-cycle cost (LCC) evaluation scheme for marine reinforced concrete structures is proposed. In this method, unlike the conventional life-cycle cost evaluation performed during the design process, the life-cycle cost is updated successively whenever new information of the chloride penetration is available. This updating is performed based on the Bayesian approach. For important structures, information required for this new method can be obtained without any difficulties because it is a common element of various types of monitoring systems. Using the new method, the life-cycle maintenance cost of structures can be estimated with a good precision.

Encrytion Method Based on Chaos Technique (카오스 이론을 이용한 암호화 기법)

  • 정성용;김태식
    • Proceedings of the Korean Information Science Society Conference
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    • 1998.10c
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    • pp.45-47
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    • 1998
  • 본 연구에서는 로버트 메이의 논리차이방정식(Logistic difference equation)을 이용하여 ASCII코드로 만들어진 문서를 암호화 할 수 있도록 하는 카오스 LCC(Logistic Chaos Cryptosystem)을 제안한다. 카오스를 이용한 암호화 기법은 기존의 암호화 기법으로 알려진 DES(Data Encrypion Standard)나 RSA(Rivest,Shamir,Adleman)등과는 비교되는 기법으로 초기 조건에 민감한 카오스의 특징을 이용하였다. 실험결과 제안된 LCC 기법을 통해 암호문은 카오스적으로 표현되었으며, 원문과 암호문 사이에 어떠한 관련성도 찾아 볼수 없었다. 향후 안전성이나 처리속도에 대한 검증과 표준화 문제 및 멀티미디어 자료등에 대한 암호화 기법을 계속 연구해야 할 것이다.

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