• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.333-336
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• 2005

기존의 시스템보다 유지, 보수 및 재사용성이 높은 분산시스템인 컴포넌트를 이용하여 프로젝트의 계획과 흐름 등을 관리하는 Project Management System을 구현하였다. PMS는 인트라넷으로 서로 연결된 네트워크를 통해 프로젝트의 인원관리 및 일정관리등 프로젝트에 관한 종합적인 관리를 실시간으로 할 수 있는 시스템이다. 이 시스템은 기존의 다른 시스템과 는 달리 비즈니스로직과 UI로직이 분리 되어있어서 재사용과 시스템아키텍처의 유연성을 높였다. 자기가 원하는 기능이 있는 컴포넌트들을 조립하여 사용하거나, 새로운 기능을 가진 컴포넌트를 추가하여, 기관에 맞는 새로운 시스템을 구축 할 수가 있다.

• Journal of Construction Engineering and Project Management
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• v.3 no.2
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• pp.58-65
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• 2013

Earthwork activities are typically performed by heavy duty diesel (HDD) construction equipment that consumes large quantities of diesel fuel use and emits large quantities of pollutants, including nitrogen oxides (NOx), particulate matters (PM), hydrocarbon (HC), carbon monoxide (CO), and carbon dioxide ($CO_2$). This paper presents the framework for a model that can be used to estimate the production rate, activity duration, total fuel use, and total pollutants emissions for earthwork activities. A case study and sensitivity analysis for an excavator performing excavations are presented. The tool is developed by combining the multiple linear regressions (MLR) approach for modeling the productivity with the EPA's NONROAD model. The excavator data from RSMeans Heavy Construction Data were selected to build the productivity model, and emission factors of all type of pollutants from NONROAD model were used to estimate the total fuel use and emissions. The MLR model for the productivity rate can explain 92% of the variability in the data. Based on the model, the fuel use and emissions of excavator increase as the trench depth increase, but as the bucket size increase, the fuel use and emissions decrease.

• International journal of advanced smart convergence
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• v.8 no.3
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• pp.161-166
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• 2019

Viewed in the rate of change in the web environment, it is very difficult to remain the initial planning at the time until the time of launch, and there is a need for a method to accommodate changes and satisfy market demands during the development process. Unlike the traditional waterfall approach of maintaining initial planning, scrum is one of the agile methodologies that enables flexibility to respond to changes in the market and customers' needs and drive customer satisfaction and business success. However, to apply the scrum to a project in actual, the practice method itself is relatively simple but not easy to apply. The reason is that the members of the organization need to understand and participate in scrum's philosophy and principles and the continuous observation and change management should be carried out. Therefore, in this paper, we presented the feature dashboard and customized scrum methodology to enable continuous observation and change management using visibility, and we shared the case that periodically reflected inspection and adaptation with the explanation of the main points. Also, based on the experience with participants, the strengths and weakness of the feature dashboard and the customized scrum methodology are summarized.

• International conference on construction engineering and project management
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• 2013.01a
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• pp.315-320
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• 2013

The aim of this study is to compare efficiency and Total Factor Productivity(TFP) between Korean and Japanese construction firms in Korea and Japan over the period of 2005-2011. The results of this study are as follows. Efficiency scores of Korean construction firms are 0.797, and Japanese construction firms are 0.921. Second, annual total factor productivity growth of Korean construction firms is 0.5% and technical progress do much for TFP decrease. However Japanese construction firms marked annual increasing of 2.5% of TFP. Third, technical progress contributed in TFP increase of construction firms in Korea. Korean construction firms, however, relatively lagged behind Japanese construction firms in technical progress. Therefore, Korean construction firms need strategies to achieve technical advances including adopting new technology or process innovation to maintain competitiveness, survive, and develop in the future competition with Japan.

• Korean Journal of Construction Engineering and Management
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• v.21 no.6
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• pp.75-83
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• 2020

This study intends to explore the scope of the recognized equity capital of developer in real estate project finance loan screening. The factors which can be recognized as equity capital are categorized into 24 factors with 3 upper categories and 6 mid categories. In order to develop the importance weight of factors, AHP and Fuzzy methodologies are implemented based on survey analysis by experts in financial institutions. Research findings indicate that the land cost, evacuation cost, and real estate acquisition tax as land-related direct costs, and the design cost, traffic impact assessment cost, underground safety impact assessment cost, boundary surveying cost, and geological survey cost as the construction permit-related costs are higher than any others. On the other hand, the supplementary costs related to the operation of the developer show very low importance weight. Accordingly, the hierarchy of factors for equity capital should be clearly developed in order to minimize any dispute and prevent non-performing loans to real estate project finance.

• Journal of Environmental Impact Assessment
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• v.31 no.6
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• pp.378-387
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• 2022

Since air pollution has become a global issue to be managed, the Republic of Korea (ROC) is protecting air quality by predicting the air condition before a construction project starts through EnvironmentalImpact Assessment (EIA) and measuring the air condition afterwards the construction project ends through Post-environmental Impact Assessment (PEIA). The aim of this study consists on verifying the predicted and measured concentration data and analyzing their consistency in order to deduce improvement directions. Linear EIA projects which the investigation during operation period have been concluded between years 2017 and 2019 were used. As a result, the following improvement directions were suggested: reduction of EIA air quality standards, strengthen the management of projects with construction duration longer than 5 years, incorporation of first or second quarter (winter or spring) into the investigation period, consideration of construction equipment or conditions for better prediction. The strength of this study is that we arranged and utilized EIA predicted and PEIA measured data to understand the present EIA procedure and made meaningful suggestions through the consistency analysis contributing to air quality maintenance and investigation methodology enhancement.

• The Journal of Society for e-Business Studies
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• v.12 no.2
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• pp.31-45
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• 2007

Over the past decades, there have been numerous studies for approaches to build and operate electronic government systems. Among those studies, work breakdown structure(WBS) has been gained attention increasingly. As a general system engineering techniques. WBS is a kind of methods to engineer and manage electronic government systems effectively. WBS is to organizes tasks and data items for management and engineering for electronic government systems. In this paper, the authors proposed a conceptual WBS model for management and engineering electronic government systems. Also, the authors conducted a case study based on the conceptual WBS model. The results of this study provide useful insights and guidelines for applying the WBS to management and engineering for electronic government systems. The authors believed that the conceptual WBS models will be widely used to management and engineering an electronic government systems.

• Journal of Korean Society of Forest Science
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• v.53 no.1
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• pp.62-74
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• 1981

The developed record of forest maschines and tools in West Germany, Austria and Swiss, their technical characteristics and the working methods with them have been tried to investigate through the study of literature and observation. The aim of this investigation is to find out and introduce the technical information for training our forest men with them and for improving or developing our forest maschines and tools. Although ax chosen as first report for this aim is the oldest tool in the mankind history, still this is widely using in the forest work. And this has some special working filed that any other maschines could not overcome and sometimes should be recommended in the agronomical sideview. Through this investigation several points could be proposed as the technical informations when we will try to improve our ax 1. Radius of as-face curvature is proposed to be 150 mm and it's central point to be passed at one third point near to ax-eye. 2. Cutting angle is proposed to be $30^{\circ}$, ax-thick at 12 mm distance from ax-face to be 4 mm, thick at 30 mm distance from face to be 5 to 6 mm and ax-face width to be $125{\pm}5mm$. 3. Neck size is proposed to be $3.5{\pm}0.5{\times}5.5{\pm}0.5cm$ with a little curvature and neck thick from ax-house to be more than 1.5 cm. 4. Ax weight is proposed to be 1,000 gr with the stupid back and the sharp front. 5. The handle length of ax will be followed to the arm length of our forest workers.

• Journal of Information Technology and Architecture
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• v.9 no.4
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• pp.423-432
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• 2012

EA (Enterprise Architecture) is an SI (System Integration) approach, i.e., a comprehensive plan for SI, which shows the elements of SI and the relationships among them. Since EA can be utilized in every stages of SI, the more large-scaled and complicated SI projects are, the more important EA is. Although many central government agencies and wide local governments implemented EA, the current level of EA utilization is still low. One of the reasons is the low level of EA updating. Some reasons of the low level of EA updating are the low frequency of EA updating, and the shortage of workers, as well. In order to improve the frequency of EA updating and alleviate the workloads of SI officers, MLTM (Ministry of land, transport, and maritime affairs) standardized the processes and documents for SI projects, and implemented PMS (Project Management System) that can support the unifying management of SI projects and be connected with EA system. We expect that EA information are updated efficiently, the level of EA utilization is boosted, and the qualities of SI products are improved, by the implementation of the PMS connected with EA system.

• The Journal of Information Systems
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• v.20 no.3
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• pp.129-159
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• 2011

본 연구의 목적은 PMO의 기능들이 프로젝트 성과에 미치는 직접 효과와 프로젝트 관리 프로세스의 수행을 통한 간접 효과를 PLS 경로모형을 통해 파악하는데 있다. 또한, PMO 역량 및 최고 경영진의 지원에 따른 프로젝트 성과의 차이의 상호 효과 및 그 효과의 크기를 찾고자 한다. 본 연구에서는 방법론 제공, 행정적 지원, 교육 및 훈련, 자원 관리, 지식 관리를 통하여 형성되는 PMO기능과 통합, 범위, 시간, 비용, 품질, HR, 커뮤니케이션, 위험, 자원조달 등을 통하여 형성되는 프로젝트 관리과정을 측정하기 위하여 2차 요인 모형(second-order construct model)으로 연구 모형을 검증하였다. 본 연구에서 각 1차 요인(first-order construct)은 반영지표를 이용하여 분석 하였으며, 2차 요인은 조형지표를 이용하여 분석하였기에, 반영지표와 조형지표가 모두 포함되어있는 모형 분석에 용이한 자료처리 도구인 PLS를 이용하였다. 본 연구의 설문대상은 PMO의 지원 하에서 프로젝트를 수행해 본 경험이 있는 프로젝트관리자나 프로젝트 리더와 같은 전문가 집단으로 한정하여 온라인 설문조사를 실시하였다. 분석 결과, PMO 기능 및 프로젝트 관리과정 모두 프로젝트 성과에 유의한 영향을 미치는 것으로 확인되었다. 또한 PMO기능을 수행할 때, PMO역량에 따라 프로젝트 성과에 유의한 차이가 존재함이 확인되었다. 따라서 경영진들은 프로젝트 수행 시 프로젝트 성과에 긍정적 영향을 미치는 PMO의 설립을 적극적으로 검토해야 한다. 또한 PMO의 역량에 따라 프로젝트 성과에 차이가 발생하므로 프로젝트를 관리하는 PMO에 충분한 권한을 부여하고 경영진의 지원을 신속하게 함으로써 프로젝트를 성공적으로 수행할 수 있을 것이다.