• 한국건설관리학회논문집
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• 제8권3호
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• pp.106-115
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• 2007

산업이 발전함에 따라 도로 터널의 사이즈와 길이는 계속적으로 증가해 왔으며 그에 따른 터널에서의 리스크 또한 증가되었다. 도로터널에서 환기방식을 결정할 때는 다양하고 많은 고려사항을 염두에 두어야 한다. 현재로서는 이러한 것들을 체계적으로 고려하여 의사결정을 지원할 수 있는 방법론 내지 시스템이 제대로 구축되어 있지 않은 실정이며 대부분 전문가의 경험을 바탕으로 한 주관적 판단에 의존하고 있다. 본 연구에서는 기존의 경제성 내지 주관적 판단에 국한하여 의사결정이 이루어지던 관행에서 벗어나 안전성, 환경친화성 등도 충분히 고려하여 결정을 내릴 수 있도록 터널별 최적의 환기방식을 선정하기 위한 일련의 절차와 기준을 제시하였다. 이 때 다속성 효용이론과, AHP기법을 적절히 활용하여 전문가 및 설계자의 주관적/정성적 평가를 객관적/정량적으로 측정할 수 있도록 하였으며, 환기 방식별 종합적 효용을 산출할 수 있는 함수를 도출하기까지의 방법론을 제시하였다. 본 논문에서 제시하는 방법론을 바탕으로 보다 합리적인 의사결정이 이루어질 것을 기대한다.

• 대한토목학회논문집
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• 제34권2호
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• pp.645-654
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• 2014

현재 우리나라 일반국도의 포장관리시스템(PMS: Pavement Management System)은 세계은행(World Bank)이 주도한 HDM (Highway Development and Management)-4를 사용하여 유지보수 의사결정의 기초 자료로 사용하고 있으나, 과다한 입력변수와 모형의 불확실성 등으로 인해 국내 실정에 적합한 경제성 분석모형이 필요하게 되었으며, 대부분의 선진국의 경우에는 각 지역과 국가에 맞는 PMS 시스템을 구축하여 운영하고 있다. 따라서 본 연구에서는 우리나라 실정에 맞고 효율적인 국도의 도로 및 포장관리를 위한 의사결정시스템을 개발하기 위한 연구로써 시스템 개발에 필요한 구성요소, 공용성 모형 개발, 각 요소별 활용가능한 원단위, 기준 등의 지표 정의 및 종류, 특성들을 분석, 정리하고 경제성 평가를 통해 최적 의사결정을 위한 시스템(S/W) 개발을 목적으로 하였다. 포장관리를 위해 개발한 의사결정시스템의 구성요소는 크게 1)도로, 교통, 사회경제 지표 등의 DB, 2) 도로포장상태의 공용성 모형, 3)도로포장상태에 따른 차량속도변화 모형, 4)경제성 평가 모형, 5) 의사결정지원 시스템으로 구성되며, 개발된 시스템의 검증을 위해 사례 구간을 대상으로 한 분석결과도 함께 제시하였다. 그러나 장래 확률적 특성을 고려한 공용성 모형의 개발과 의사결정을 위한 지표 개발에 대해서는 추가적인 연구가 필요할 것으로 판단된다.

• Industrial Engineering and Management Systems
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• 제6권1호
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• pp.83-93
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• 2007

This paper gives an attempt to build a decision support tool linked with a simulation software called ARENA for evaluating and comparing the performance of the push and pull material driven strategies operating in the flow shop environment with a bottleneck resource as the shop's constraint. To be fair for such evaluation, the comparison must be made fairly under the optimal setting of both systems' operating parameters. In this study, an optimal-seeking heuristic algorithm, Genetic Algorithm (GA), is employed to suggest a systems' best design based on the economic consideration, which is the profit generated from the system. Results from the study have revealed interesting outcomes, letting us know the strength and weakness of the push and pull mechanisms as well as the effect of each operating parameter to the overall system's financial performance.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 추계학술대회 논문집 학회본부 A
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• pp.180-183
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• 2000

The Battery Energy Storage System(BESS) has lots of advantages such as load levelling, quick response emergency power(spinning reserve), frequency and voltage control, improvement of reliability, and deferred generation and transmission construction. The economic feasibility requires justification from the customer side of meter to promoting the dissemination of BESS nationally. In this paper, we proposed the economic assessment model of customer owned Battery Energy Storage System(BESS) which is complemented and improved the existing model. The proposed model is applied to the typical customer type(light-industrial commercial, and residential) which are taken from the statistical analysis on the load profile survey of Korea Electric Power COmpany (KEPCO). The economic assessment performed for each customer type to justifying their economic feasibility of BESS installation from the economic measures such as payback period, overall benefits, ROI, and ROR. The results of this paper are useful to the customer investment decision making and the national energy policy & strategy.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2002년도 학술대회지
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• pp.327-330
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• 2002

최근 공통주택 재건축과 리모델링 사업은 경제성만을 고려하여 사업이 추진되고 있다. 그러나 경제성 이외에도 환경성은 사업계획 및 수행에 있어서 중요한 고려요소이다. 따라서 재건축과 리모델링 사업의 환경성과 경제성을 함께 평가되어야 하며, 정량적인 평가방법에 의해 의사결정의 도구로써 활용할 수 있는 방법이 필요하다. 이에 본 연구는 공동주택 재건축과 리모델링 사업의 환경성 및 경제성을 통합 및 평가할 수 있는 모델을 제시하고자 한다.

• 산업경영시스템학회지
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• 제41권4호
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• pp.111-122
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• 2018

The private sector is currently reviewing the feasibility of the project or deciding economic policies by analyzing the economic ripple effects. However, the arms acquisition project focuses on the need for the national defense weapons system by analyzing the costs and the effectiveness of the analysis and reviewing the necessity and feasibility of the project. In order to analyze the economic ripple effects, KB (the Bank of Korea) prepares and publishes an analysis table of industrial associations in a given unit. IAAR (the industrial association analysis report) is difficult to apply directly to the defense weapons system. Therefore, research on the economic ripple effects applicable to the defense arms procurement project was needed. In this study, we propose the generic methodology for estimating economical and technical ripple effects resulted in acquiring new weapon systems. Based on the analysis of inter-industrial relations, economical ripple effects are estimated with production inducing effects, value-induced effects, employment-induced effects and export-induced effects. Also, the technological ripple effects are estimated with technological intensity represented by investment cost in research and development. To show the validity of proposed methodology, a case study of acquiring new weapon systems such as GR (guided rocket), destroyer, and helicopter is accomplished. From the case study, it is concluded that these economical & technological ripple effects can be used as a reference to decision making in the course of acquiring major future defense weapons systems.

• Nuclear Engineering and Technology
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• 제53권1호
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• pp.314-321
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• 2021

As Indonesia is rich in natural resources, nuclear power remains a low priority among energy alternatives. However, Indonesia needs to introduce nuclear power to improve the atmospheric environment and to support sustainable economic growth. This study conducted a two-stage survey of logit-probit and analytic hierarchy process to analyze the perception of Indonesian energy policymakers regarding the introduction of nuclear power, the potential for change, and key decision factors. The analysis confirms that the perception of nuclear power is positive and that the willingness to expand nuclear power can improve if negative conditions, such as underdeveloped technology level, foreign aid and assistance, and safety issues are addressed. In addition, it is confirmed that the policy makers consider political/social and environmental factors to be more important for decision-making. The results of this study can give inplications and be used as a key reference for Indonesia's nuclear power policy

• 한국농공학회논문집
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• 제55권2호
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• pp.9-20
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• 2013

Many studies have reported additional treatment is needed to use wastewater for agricultural purpose. Economic considerations should be taken into account to establish infrastructure for agricultural reuse because of a large amount of water use in irrigation and relatively low water quality requirement. The objective of this study was to conduct economic analysis of wastewater reclamation and reuse systems for agriculture. A system dynamics approach considering complexity and dynamics in the wastewater reuse systems was used for the economic analysis, which are related with social, environmental, and economic problems. Sensitivity and benefit cost analysis for wastewater reuse systems was conducted through the established economic assessment model. The result of sensitivity analysis showed that water resources development and installation cost were the most sensitive for total benefits and costs, respectively. The scenario-based test of the organized economic assessment model shows marginal cost ranges and enables decision-makers to decide reasonable cost for the wastewater reuse systems for agriculture.

• Smart Structures and Systems
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• 제29권1호
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• pp.251-266
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• 2022

Structural Health Monitoring (SHM) of critical infrastructure comprises a major pillar of maintenance management, shielding public safety and economic sustainability. Although SHM is usually associated with data-driven metrics and thresholds, expert judgement is essential, especially in cases where erroneous predictions can bear casualties or substantial economic loss. Considering that visual inspections are time consuming and potentially subjective, artificial-intelligence tools may be leveraged in order to minimize the inspection effort and provide objective outcomes. In this context, timely detection of sensor malfunctioning is crucial in preventing inaccurate assessment and false alarms. The present work introduces a sensor-fault detection and interpretation framework, based on the well-established support-vector machine scheme for anomaly detection, combined with a coalitional game-theory approach. The proposed framework is implemented in two datasets, provided along the 1st International Project Competition for Structural Health Monitoring (IPC-SHM 2020), comprising acceleration and cable-load measurements from two real cable-stayed bridges. The results demonstrate good predictive performance and highlight the potential for seamless adaption of the algorithm to intrinsically different data domains. For the first time, the term "decision trajectories", originating from the field of cognitive sciences, is introduced and applied in the context of SHM. This provides an intuitive and comprehensive illustration of the impact of individual features, along with an elaboration on feature dependencies that drive individual model predictions. Overall, the proposed framework provides an easy-to-train, application-agnostic and interpretable anomaly detector, which can be integrated into the preprocessing part of various SHM and condition-monitoring applications, offering a first screening of the sensor health prior to further analysis.

• 한국경영과학회지
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• 제11권1호
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• pp.12-23
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• 1986

The minimum attractive rate of return (MARR) has been used for many years as a decision criterion in engineering economic analysis. Typically, inflation has been either ignored in such studies or considered by adjusting each of the individual cash flows associated with a project for inflation, frequently a lengthy process. This research investigates a new decision criterion for economic analysis, the comparative rate of return (CRR). The CRR is defined to be the minimum rate of return earned on uninflated cash flows of proposed expenditures is simplified, since the analysis can be performed on the uninflated cash flows. The research presents a derivation of the CRR and investigates its relationships to the MARR, inflation rate project cash flows and project life.