• KDI Journal of Economic Policy
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• v.16 no.2
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• pp.141-170
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• 1994

지금까지 사회보장제도(社會保障制度)의 경제적(經濟的) 효율성(效率性)에 대한 많은 논의가 있어 왔다. 그러나 그중 생애주기(生涯週期)(life-cycle)에 바탕을 둔 일반균형연산모형(一般均衡演算模型)(AGE : Applied General Equilibrium)에 의환 경험적 분석은 미진하였다. 본(本) 연구(硏究)의 목적(目的)은 사회보장제도(社會保障制度)의 세대내(世代內) 생애소득분위간(生涯所得分位間) 재분배효과(再分配效果)와 경제적(經濟的) 효율성(效率性)을 분석하는 데 있다. 연구방법으로서 Fullerton and Rogers(1993) 모형을 수정한 일부문(一部門), 다소비자(多消費者) 생애주기(生涯週期) 일반균형연산모형(一般均衡演算模型)을 이용하였다. 본 연구는 미국을 대상으로 한 정상상태(定常狀態)(steady state)의 분석이며, 소비자(消費者)를 생애소득별(生涯所得別)로 5분위(分位)로 나누어 기존 사회보장세(社會保障稅) 및 급여(給與)가 경제적(經濟的) 효율성(效率性)뿐만 아니라 계층간(階層間)의 분배(分配)에 어떠한 영향을 주는지를 분석하였다. 본(本) 연구(硏究)의 주요한 기여사항(寄與事項)은, 첫째 사회보장제도(社會保障制度)의 부담귀착분석(負擔歸着分析)에 새로운 연구방법(硏究方法)을 시도하였다는 점, 둘째 재정정책(財政政策)의 하나인 사회보장제도(社會保障制度)의 실질적(實質的) 부담(負擔)의 귀착문제(歸着問題)를 생애주기모형(生涯週期模型)으로 분석하였다는 점, 셋째 부담(負擔)의 귀착(歸着)은 사회보장세(社會保障稅)와 아울러 사회보장급여(社會保障給與)를 고려하여 분석하지 않으면 편향(偏向)(biased) 될 수 있다는 점을 지적한 점, 넷째 분석결과(分析結果) 기존 사회보장제도(社會保障制度)는 생애주기적(生涯週期的) 소득분배(所得分配)의 관점에서 누진적(累進的)(progressive)인 제도이지만 경제적(經濟的) 비효율성(非效率性)(efficiency cost)을 내재하고 있다는 점 등을 밝힌 것이다.

• Journal of the Korean Regional Science Association
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• v.31 no.3
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• pp.55-77
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• 2015

The purpose of this research is to analyze the influence of the regional location factors to the lifecycle of manufacturing firms in the Seoul Metropolitan Area. A firm has a lifecycle in common like a household. The firm's lifecycle is divided into 4 sections such as formation, dissolution, growth and decline for the manufacturing firms as light industry, heavy industry and high-tech industry. In addition, the regional location factors are divided into 4 categories. As a result of this research, there are differences for the statistically significant location factors. In addition, the value for the explanation ability of each multiple linear regression model (adj. $R^2$) was high in the formation and growth sections than in dissolution and decline sections. It means that the local governments need differentiated policies considering their regional characteristics for the location factors by firm's lifecycle when they established policies for industry or job. From the view point of the public sectors, it is much important to focus on formation and growth of firms.

• Land and Housing Review
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• v.5 no.4
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• pp.297-303
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• 2014

Recently, block and permeable pavements have been placed in apartment complex. However. it is hard to decide the cycle of maintenance and repair due to lack of performance evaluation criteria for these pavements. This study carried out life cycle cost analysis(LCCA) to present resonable alternatives of the pavements by considering initial construction cost, maintenance and repair cost along with the cycle of repair. According to results of LCCA, the interlocking concrete block pavement is the best alternative when the repair cycle of 20years is assumed, while asphalt concrete pavement is the best alterative when the repair cycle of 10years is assumed. Therefore, the repair cycle is most important factor to select alternative. Also, it is necessary to develop resonable performance evaluation index to quantify the cycle of maintenance and repair in the future.

• Journal of Korea Water Resources Association
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• v.36 no.5
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• pp.715-724
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• 2003

It is true that SOC facilities, such as dams, need long life cycles since more time has to be invested for the phases of planning, examination, feasibility study, design, contract, construction, and maintenance. This longer life cycle is easily exposed to the risk. And thus, brings additional cost by the delayed project, convenient loss according to the additional run of use, and benefit lose of not to using the facilities. So, the purpose of this study is to try to find a solution to reduce these time consuming problems which could diminish the whole national competition. Hence, this study is to show efficient, systematical project performance and network model by using reciprocal analyses between the construction period and cost based on economical analysis of each phase of life cycles. In addition, on the basis of these outputs, the Fast Track Method is suggested as an alternative solution as a new Approach in Life Cycle's Analysis.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.484-484
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• 2017

최근 홍수 시 제방붕괴로 인한 인명 및 재산피해가 증가되고 있어 노후화된 제방 시설물의 안전관리 체계에 대한 필요성으로 국토교통부에서는 국가하천유지보수 종합체계 시스템을 개발하였으나 아직 시범단계로 실무에 적용하여 활용하고 있지 못한 실정이다. 효율적인 국가하천시설에 대한 유지관리를 위한 자료D/B화 및 관리대장, 점검기법, 보수보기법 등을 제시하고 있으나 국가하천에 국한되어 있어 전국단위 하천시설물의 전주기에 대한 통합적인 관리는 반영되어 있지 못하다. 하천시설물 생애주기관리를 위해서는 모든 하천시설물에 대한 이력관리가 필요하나 현재는 시설물의 안전관리에 관한 특별법(시특법) 상의 1, 2종 시설물에 대해서만 시설물정보관리종합시스템(FMS)에서 이력관리를 수행하고 있는 실정이다. 따라서 본 연구에서는 국가하천 및 지방하천에 대한 하천시설물의 생애주기 관리방안을 도출하기 위해 기존의 시스템의 기능 및 구조를 분석하였으며 이를 통해 하천시설물 생애주기 관리방안을 제시하였다.

• Journal of the Korean association of regional geographers
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• v.18 no.3
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• pp.283-297
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• 2012

This study aims to analyze an evolutionary path and the dynamics of the Seoul Digital Industrial Complex in Korea based on the analysis of cluster life cycles. From the mid 1960s to the late 1990s, the life cycles and their characteristics of the Seoul Digital Industrial Complex (Guro Industrial Park) are examined as emergence-growth-sustainment-decline focused on the number of firms and employees. After the late 1990s, the number of firms and employees increases rapidly and the active actors of the growth and restructuring are transformed to the technology-intensive SMEs and knowledge-based service firms. Knowledge industry centers (apartment-type factories) help evolve into the life cycle of transformation as knowledge-based clusters after the mid 2000s.

• Proceedings of the Safety Management and Science Conference
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• 2012.11a
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• pp.499-506
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• 2012

본 연구는 통계청(2009-2010)의 국가 산업 표준을 기본으로 생애주기를 고려한다. 생애주기에 대한 변수는 경제활동인구와 사업체 동향을 분석하여 실시하며 이에 따른 자격은 산업과 직업에 관련하여 해당하는 자격의 매칭 테이블을 기준으로 그 자격의 가치를 평가하는 방법을 선택하였다. 산업에 대한 분석은 일반적으로 활용되고 있는 경영기법에 따라 그 절차를 수용하고 관련변수를 응용 또는 적용하도록 하였다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.26 no.6
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• pp.415-421
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• 2013

In order to extend the service life of a nuclear power plant(NPP) ensuring the structural safety, effective and efficient management of NPP considering structural deteriorations and various natural hazard risks has been treated as a significant tool(IAEA 1998). The systemic efforts is required to prevent the potential loss of NPPs resulting from the natural hazard including earthquakes, hurricane and flooding since the Fukushima accident. Earthquake risk of building structures can be mitigated through appropriate seismic isolation system installation. It has been known that a seismic isolation system can lead to reduction of the deleterious effect on ground motion induced by earthquakes, and structural safety can be improved. In this paper, the NPP life-cycle management is reviewed. Furthermore, effect of seismic isolation on the NPP life-cycle cost analysis with earthquake, and cost-benefit analysis in terms of life-cycle cost when applying the seismic isolation systems to NPP are introduced.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.5
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• pp.2081-2091
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• 2013

Recently, the demand on the practical application of life-cycle cost effectiveness for design and rehabilitation of civil infrastructure is rapidly growing unprecedently in civil engineering practice. Accordingly, in the 21st century, it is almost obvious that life-cycle cost together with value engineering will become a new paradigm for all engineering decision problems in practice. However, in spite of impressive progress in the researches on the LCC, the most researches have only focused on the Deterministic or Probabilistic LCC analysis approach and general bridge at design stage. Thus, the goal of this study is to develop a practical and realistic methodology for the Life-Cycle Cost LCC-effective optimum decision-making based on reliability analysis of bridges at design stage. The proposed updated methodology is based on the concept of Life Cycle Performance(LCP) which is expressed as the sum of present value of expected direct/indirect maintenance costs with expected optimal maintenance scenario. The updated LCC methodology proposed in this study is applied to the optimum design problem of an actual highway bridge with Cable Stayed Bridges. In conclusion, based on the application of the proposed methods to an actual example bridge, it is demonstrated that a updated methodology for performance-based LCC analysis proposed in this thesis, shown applicably in practice as a efficient, practical, process LCC analysis method at design stage.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.4
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• pp.19-25
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• 2016

Engineering structures including civil infrastructures require a life-cycle cost and benefit during their service lives. The service life of a structure can be extended through appropriate inspection and maintenance actions. In general, this service life extension requires more life-cycle cost and cumulative benefit. For this reason, structure managers need to make a rational decision regarding the service life management considering both the cost and benefit simultaneously. In this paper, the probabilistic decision tool to determine the optimal service life based on cost-benefit analysis is presented. This decision tool requires an estimation of the time-dependent effective cost-benefit under uncertainty to formulate the optimization problem. The effective cost-benefit is expressed by the difference between the cumulative benefit and life-cycle cost of a deteriorating structure over time. The objective of the optimization problem is maximizing the effective cost-benefit, and the associated solutions are the optimal service life and maintenance interventions. The decision tool presented in this paper can be applied to any deteriorating engineering structure.