• 한국경영과학회지
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• 제19권1호
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• pp.189-199
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• 1994

This paper considers the covering network design problem (CNDP). In the CNDP, an undirected graph is given where nodes correspond to potential facility sites and arcs to potential links connecting facilities. The objective of the CNDP is to identify the least cost connected subgraph whose nodes cover the given demand points. The problem difines a demand point to be covered if some node in the selected graph is present within an appropriate distance from the demand point. We present an integer programming formulation for the problem and develop a dual-based solution procedure. The computational results for randomly generated test problems are also shown.

• 품질경영학회지
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• 제50권3호
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• pp.349-371
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• 2022

Purpose: Compared to the rapid growth rate of the domestic automotive LED industry so far, the predictive analysis method for demand forecasting or market outlook was insufficient. Accordingly, product characteristics are analyzed through the life trend of LEDs for automotive exterior lamps and the relative strengths of p and q using the Bass model. Also, future demands are predicted. Methods: We used sales data of a leading company in domestic market of automotive LEDs. Considering the autocorrelation error term of this data, parameters m, p, and q were estimated through the modified estimation method of OLS and the NLS(Nonlinear Least Squares) method, and the optimal method was selected by comparing prediction error performance such as RMSE. Future annual demands and cumulative demands were predicted through the growth curve obtained from Bass-NLS model. In addition, various nonlinear growth curve models were applied to the data to compare the Bass-NLS model with potential market demand, and an optimal model was derived. Results: From the analysis, the parameter estimation results by Bass-NLS obtained m=1338.13, p=0.0026, q=0.3003. If the current trend continues, domestic automotive LED market is predicted to reach its maximum peak in 2021 and the maximum demand is $102.23M. Potential market demand was $1338.13M. In the nonlinear growth curve model analysis, the Gompertz model was selected as the optimal model, and the potential market size was $2864.018M. Conclusion: It is expected that the Bass-NLS method will be applied to LED sales data for automotive to find out the characteristics of the relative strength of q/p of products and to be used to predict current demand and future cumulative demand.

• 농촌계획
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• 제29권1호
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• pp.11-17
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• 2023

In this study, the effect of orchard expansion, structural improvement, and potential demand of the orchard scale-up project implemented since 2004 to strengthen the competitiveness of orchard farmers was examined. The results of the analysis are summarized as follows. First, looking at the effect of scale-up by checking the standard income data of the Rural Development Administration, it was possible to confirm the effect of scale-up in that the income per unit area increases as the scale increases. Second, through the scale-up project, the effect of structural improvement in transferring the orchards of the aged farm households to the younger farm households was confirmed to be 13 years old on average in the case of a sale business and 16 years old in the case of a lease business. Third, it was found that income increased at a statistically significant level after participating in the orchard scale-up project for major fruit crops such as apples, pears, and peaches. Fourth, it was found that age and cultivated area had a statistical effect on the probability of participating in the orchard scale-up project for farmers who did not participate in the project. The potential business demand using the estimated results was found to be between 25,203 and 37,089.

• 항공우주시스템공학회지
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• 제8권3호
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• pp.34-40
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• 2014

Since the global economic crisis in year 2008, the world civil helicopter market has been growing recently. According to the market outlook in the next decade, the demand of civil helicopter will be driven by the demand of Private & Corporate, Oil & Gas, Off-shore and EMS(Emergency Medical Service) usages. On the other side, the demand of military market will be driven by the modification and upgrading for life extension or performance enhancement than the new helicopter development for replacing old models. To summarize these situations, the demand of MRO(Maintenance, Repair & Overhaul) market has also been on the rise because of the demand due to above several usages in civil side and the life-extension in military side. Through the MRO market analysis for characteristics, developmental trends and a supply chain, this paper describes that the potential of MRO business is considerably large as a propulsive power of domestic helicopter industry. And also, it proposes the construction direction of MRO network because the domestic industry must make the developmental awareness and reliability a stepping-stone towards own helicopter.

• 대한안전경영과학회지
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• 제9권5호
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• pp.103-110
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• 2007

To build a most efficient and competitive warehouse, need to reflect tenants various opinions in advance such as location, rentable size, leasing terms, rental, configuration of the building, building structure, traffic flow and amenities. Thus a survey for major tenants which are logistics, retailers and manufactures should be done to figure out potential demand and marketing strategy to lead to be a competitive warehouse. However above survey is time consuming work and requires high cost involvement thus to avoid such an inefficient process and to facilitate investors prompt and right decision making, there should be a tool which helps to make a decision process easier with simple key factors. In other word, we have used above mentioned 'Demand Approach' so far but here I am introducing 'Factors Comparison' which reflects location factors and facility factors. I derived Kwang-myung logistics park's proper rental rate through 'Demand Approach' which analyzed Seoul Metropolitan area's rental warehouse status and rents, and also defined a size of potential demand area and rental. And this report compared the result with an outcome of 'Factors Comparison' then compared each methods and drew a conclusion of 'Factors Comparion's better convenience and efficiency.

• 지역연구
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• 제40권2호
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• pp.75-89
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• 2024

비수도권 중소도시의 도시서비스 효율성 저하 문제가 심화됨에 따라 지역거점을 통한 압축적 도시 공간을 형성하고자 철도역세권 개발의 필요성이 강조되고 있다. 대도시 주요 역세권은 복합단지 형태로의 개발이 이루어지고 있지만, 중소도시 역세권의 개발 입지적 특성에 대한 분석은 부족한 실정이다. 본 연구는 전국의 고속철도 역세권을 대상으로 개발 사업여건과 잠재수요의 특성을 분석하여 수도권 대도시, 비수도권 대도시, 비수도권 중소도시의 도시유형에 따른 입지적 특성 차이를 파악하고, 이에 적합한 개발방식을 알아보는 것을 목적으로 한다. 분석결과, '수도권 대도시 역세권'은 높은 잠재수요와 열악한 사업여건을 갖고 있는 것으로 분석되었다. 반면에 비수도권의 경우에는, '중소도시 역세권'은 양호한 사업여건과 낮은 잠재수요의 특징, '대도시 역세권'은 중간적 성격을 가지는 것으로 분석되었다. 이는 대도시와 중소도시 역세권 개발에 있어 서로 다른 개발방식의 필요성을 시사한다. 본 연구의 분석결과는 대규모 비용의 투입이 필요한 대도시 역세권은 잠재수요를 극대화하기 위한 민간참여형 사업을, 중소도시 역세권은 양호한 사업여건을 바탕으로 공공주도형 사업을 진행하거나 지역 특성에 기반한 개발을 통해 민간참여를 유도하는 것이 바람직함을 보여주고 있다.

• 토지주택연구
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• 제5권4호
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• pp.247-257
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• 2014

본 연구는 최근 임대 및 소규모 위주의 공공주택정책과 개발 패러다임의 변화를 반영하여 소규모 주택사업지구와 행복주택사업지구를 중심으로 하는 새로운 주택수요평가모델을 제시하였다. 공공주택 사업지구의 수요평가모델은 정량적 평가요소인 잠재소요지표, 수요압력지표와 정성적 평가요소인 지역여건지표로 구성된다. 소규모 주택사업지구의 잠재소요지표는 읍 면 동 단위의 해당 지역에서 도출된 잠재소요량에서 기 공급된 건설임대와 매입 임대 재고물량을 차감하여 산출하였다. 이렇게 산출된 실제소요물량과 신규공급계획물량을 비교하여 공급의 미달, 적정, 초과를 판단하였다. 도심 내 젊은 층을 위한 행복주택사업지구의 경우 잠재소요지표는 시 군 구 단위의 해당 지역에서 행복주택공급대상계층인 대학생, 사회초년생, 신혼부부를 대상으로 임차여부, 소득요건 등을 바탕으로 추정하였다. 중소도시 및 농어촌지역 소규모 주택사업지구의 경우 수요압력지표는 해당 지역의 청약저축가입자수, 기초생활보장수급자수, 국가보훈대상자수와 각각의 무주택가구수 대비 비중으로 산출하였다. 다만 지역여건지표와 산업단지 개발 등 향후 인구유발요인 등을 감안하여 후보지 선정여부를 종합적으로 판단하도록 하였다. 행복주택사업지구의 수요압력지표는 해당지역의 소형주택재고비율, 전세가격상승률, 전세가격수준, 월세거주가구비율로 하였고 이를 전국 및 해당 시 도 평균과 비교하여 수요압력 정도를 판단하였다. 또한 행복주택의 사업여건이나 입지경쟁력과 관련된 대중교통이용여건, 주변시설현황, 중심지와의 거리, 지역개발현황 등의 지역여건지표를 바탕으로 최종적인 평가가 이루어지도록 하였다.

• 한국산학기술학회논문지
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• 제16권7호
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• pp.4489-4497
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• 2015

본 연구는 말고기에 대한 소비자 수요와 지불의사액을 추정하는데 연구목적이 있다. 먼저 말고기에 대한 소비자 수요를 현재수요(current demand), 잠재추가수요(potential demand) 그리고 잠재신규수요(latent demand)로 구분하여 조사하였으며 로짓 모형을 이용하여 소비자 수요별 설명변수와의 유의성을 검토하였다. 다음으로 이선선택형 가상가치법(DC-CVM)을 이용하여 말고기에 대한 지불의사액을 추정하였다. 말고기에 대한 소비자 지불의사액은 한우 3등급 등심부위 가격의 67.8% 수준이었으며, 이들 지불의사액에 미치는 영향은 남자일수록, 연령이 낮을수록, 그리고 말고기에 대한 인지도가 높을수록 지불의사액이 높았다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2018년도 학술발표회
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• pp.485-485
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• 2018

Rainwater harvesting system (RWH) can provide a relief for the household and farmers especially in areas with intense water scarcity during the long lull of rainy season. However, much attention has not been given to this alternative water source in Nigeria. This paper estimates the per capita water demand for 1,950 inhabitants and rainwater potential in Ojonbodu Estate, Oyo State, Nigeria, using data from detailed questionnaires, water consumption calculator software, and 20-year rainfall data. The potential rainwater estimation was based on amount of precipitation, size of catchment and runoff coefficient. Consequently, using estimated values of $39420m^3$ and $6.5114{\times}10^7m^3$ for per capita consumption and potential rainwater respectively, the rainwater harvesting system was designed for rainwater collection, and storage. The harvested rainwater was $450, 000m^3$ with collection efficiency of 69.16 %, which exceeded the household water consumption requirement. Thus, the harvested rainwater was able to meet the estimated water demand of the Ojonbodu Estate households during the period of water scarcity.

• 대한안전경영과학회지
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• 제21권1호
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• pp.9-16
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• 2019

Logistics companies are worrying about securing of differential competitiveness so as to be competitive companies in keen logistics market. The ground is how users are satisfied by sell-established service system to respond not only economic feasibility of logistics costs but also diversity and advancement of logistics needs. The competitiveness of logistics companies is also caused by customer satisfaction of service and only companies finding and satisfying customer needs continuously may be more competitive. For the competitiveness, it's the most important to analyze demands of current and potential customers and their pursuing value properly. Therefore, this researcher grasped PSL for online logistics service users with 5-point Likert-scale and quality-level decision method that consider the weighted value based on Kano model, measured customer's potential Demand for service through PCDI, and suggested methodology for deciding the priority of the improvement with loss function of Taguchi.