• 제목/요약/키워드: project effectiveness

검색결과 853건 처리시간 0.029초

ANALYZING CAUSES OF CHANGE ORDERS IN KOREA ROAD PROJECTS

  • Kang-Wook Lee;Wooyong Jung;Seung Heon Han;Byeong-Heon Yoon
    • 국제학술발표논문집
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    • The 3th International Conference on Construction Engineering and Project Management
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    • pp.1283-1287
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    • 2009
  • The Korean government implemented 259 road projects from 2004 to 2007, valued at $18.4 billion. Change orders of these road projects occurred 8,973 times and, subsequently, caused significant increases in the cost of the projects, approximately up to $4.2 billion (22.8% of the initial budget). These significant problems of huge change orders require a more workable control system for budget management whereas the effectiveness of the government's control is still not satisfied. However, previous approaches and studies mostly limited their analyses to simply classifying the causes of the change orders. This paper investigates the real frequency and cost impacts incurred by each cause of a change order, primarily based on 218 road projects in Korea. The paper then identifies the attributes of change orders through a survey of 204 project participants in that those sources were inevitable or avoided if properly managed. The causes of the change orders are further analyzed with analysis of variance (ANOVA) in connection with contract volume, bid award rate, the contractor's capacity to perform, and the design company's capacity. This study found that if the contract volume is smaller, then the possibility of change orders is higher. Interestingly, if the bid award rate is less than 67.5%, it signifies the highest rate of change orders. In addition, the contractors whose construction ability is assessed as the top-ranked group showed the lowest change order rates. With these results, this paper provides the preventive guidelines for reducing the likelihood of change orders.

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Bayesian Theorem-based Prediction of Success in Building Commissioning

  • Park, Borinara
    • 국제학술발표논문집
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    • The 6th International Conference on Construction Engineering and Project Management
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    • pp.523-526
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    • 2015
  • In recent years, building commissioning has often been part of a standard delivery practice in construction, particularly in the high-performance green building market, to ensure the building is designed and constructed per owner's requirements. Commissioning, therefore, intends to provide quality assurance that buildings perform as intended by the design and often helps achieve energy savings. Commissioning, however, is not as widely adopted as its potential benefits are perceived. Owners are still skeptical of the cost-effectiveness claims by energy management and commissioning professionals. One of the issues in the current commissioning practice is that not every project is guaranteed to benefit from the commissioning services. This, coupled with its added cost, the commissioning service is not acquired with great acceptance and confidence by building owners. To overcome this issue, this paper presents a unique methodology to enhance owner's predicting capability of the degree of success of commissioning service using the Bayesian theorem. The paper analyzes a situation where a future building owner wants to use a pre-commissioning in an attempt to refine the success rate of the future commissioned building performance. The author proposes the Bayesian theorem based framework to improve the current commissioning practice where building owners are not given accurate information how much successful their projects are going to be in terms of energy savings from the commissioning service. What should be provided to the building owners who consider their buildings to be commissioned is that they need some indicators how likely their projects benefit from the commissioning process. Based on this, the owners can make better informed decisions whether or not they acquire a commissioning service.

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AHP 기법을 이용한 우리나라 수산업관측사업의 추진방향에 관한 연구 (A Study on Development Strategies of the Korean Fisheries Outlook Project based on AHP)

  • 남종오;노승국
    • 수산경영론집
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    • 제41권1호
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    • pp.25-52
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    • 2010
  • The purpose of this paper is to suggest major strategies and necessary new projects for the medium- and long-term development of the Korean Fisheries Outlook Project. To suggest the Korean Fisheries Outlook Center with the above purpose, this paper employs Analytic Hierarchy Process analysis based on surveys obtained by special groups related with the KFOP. The survey is broadly composed of two goals; the medium- and long-term development directions and setting up of new furtherance projects. Each goal has upper and lower strategies respectively. The first goal, the medium- and long-term development directions, has four factors as upper strategies. The upper strategies are composed of accuracy, efficiency, timeliness, and political effectiveness of the fisheries outlook information. In addition, each upper strategy has three lower strategies respectively. For example, accuracy of the fisheries outlook information includes strength of data collection function, strength of satellite photography function, and strength of data analysis function. The second goal, setting up of new furtherance projects, has three factors as upper strategies. The upper strategies consist of accuracy promotion of outlook information using high-technique, field expansion of outlook species, and strength of analyzing function on oversea fisheries information. Each upper strategy has three lower strategies respectively. For instant, accuracy promotion of outlook information using high-technique has strength of information analysis function covered from production to consumption, strength of satellite information function, and structure of forecasting model on demand and supply by outlook species. The above upper and lower strategies were analytically drawn out through insightful interviews with special groups such as officials of the government, presidents of the producer and distributor groups, and researchers of the Korea Maritime Institute and other research institutes. As a result of AHP analysis, first, priorities of upper strategies with the medium- and long-term development directions are analyzed as accuracy, timeliness, political effectiveness, and efficiency in order. Also, priorities of all lower strategies reflecting priorities of upper strategies are examined as includes strength of data collection function on the fisheries outlook information, delivery of rapid information on outlook products for all people interested, strength of data analysis function on fisheries outlook information, strength of consumption outlook function on fish products, and strength of early warning system for domestic fish products in order. Second, priorities of upper strategies with the setting up of new furtherance projects are analyzed as accuracy promotion of outlook information using high-technique, field expansion of outlook species, and strength of analysis function on oversea fisheries information in order. In addition, priorities of all lower strategies reflecting priorities of upper strategies are examined as building up of forecasting model on demand and supply by outlook species, strength of information analysis function covering all steps from production to consumption, expansion of consumption outlook for consumers, strength of movement analysis function of oversea farming industry, and outlook expansion of farming species.

건강보험 시범사업 기관에 내원한 요통환자에 대한 추나요법 유효성 평가 연구 (Evaluating the Effectiveness of Chuna Manual Therapy for low back pain in the Pilot Insuring Project of the National Health Insurance)

  • 류지선;김동수;신병철;임병묵
    • 대한예방한의학회지
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    • 제22권3호
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    • pp.1-10
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    • 2018
  • Backgrounds : In 2017, National Health Insurance implemented the pilot insuring project for Chuna manual therapy(CMT). 65 Korean Medicine(KM) hospitals and clinics were selected in the project to monitor the provision of insured CMT. Objectives : This study aimed to evaluate the effectiveness of CMT for low back pain provided in the real world setting. Methods : Patients with low back pain who agreed to participated in the study were enrolled and requested to complete questionnaires. Patients who received CMT regardless of receiving other KM therapies were classified to Chuna group, and patient who received KM therapies without CMT to KM group. Pain(pain-VAS) and back function(KODI, Oswestry disability index-Korean version), quality of life were assessed at baseline, 4 weeks, and 8 weeks. Additionally, patients who received CMT twice and more, and who's pain-VAS 20 and over were included, and patients who used pain injection were excluded in the analysis. Results : Of 371 patients who completed all questionnaire (mean age=42.6years, SD=12.45; 61% female), 96 were excluded, 170 were in Chuna group, and 105 were in KM group. Proportions of patients who had low back pain for more than twelve weeks in the Chuna group and KM group were 57.7% and 24.8%, respectively. Pain and back function were significantly improved on 4weeks and 8weeks in both groups, but there was no difference between two groups. For the patients in the sub-acute and chronic stage(>=12 weeks), change of total KODI scores in the Chuna group was higher than KM group(p=0.013) at 4weeks. Conclusions : CMT with other KM therapies can improve back function in the sub-acute and chronic patients. For insurance policy decision, economic evaluation of CMT is needed.

PVD를 활용한 C-ITS 차량 내 경고정보 제공에 따른 주행 및 환경영향 분석 (Analysis of Driving and Environmental Impacts by Providing Warning Information in C-ITS Vehicles Using PVD)

  • 김윤미;김호선;강경표;김승범
    • 한국ITS학회 논문지
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    • 제22권5호
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    • pp.224-239
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    • 2023
  • C-ITS(Cooperative-Intelligent Transportation System)는 차량과 차량 또는 차량과 인프라 간의 양방향 무선통신 기술을 기반으로 전방의 교통상황 정보를 제공하는 이용자 안전중심의 기술 및 시스템을 의미한다. 2016년 대전-세종 시범사업을 시작으로 고속도로 및 지자체 실증사업을 통해 통신 인프라 구축, 단말기 보급, C-ITS 안전 서비스를 제공하고 있다. 본 연구에서는 광주광역시 C-ITS 실증사업을 통해 수집된 개별차량 데이터를 활용하여 경고 정보의 개별적인 효과를 검증하기 위한 방법론을 개발하였다. 효과분석은 크게 주행영향 분석과 환경분석으로 나뉘며 주행영향 분석을 위해 순응도 분석과 주행안전성 평가를 수행하였다. 추가로 C-ITS 실증사업 기간동안 수집되었던 PVD (Probe Vehicle Data)의 부족한 데이터 수집을 보완하고자 DTG (Digital Tacho Graph) 데이터를 추가 수집하여 효과분석에 활용하였다. 순응도 분석결과 충분한 유효샘플이 수집된 경고정보에 대해 운전자는 감속운행행태를 보였으며, Jerk와 가속 소음과 같은 주행안전성 지표를 산출하여 분석한 결과 경고정보 제공으로 인해 주행안전성이 개선되었다. 반면 감속운행행태로 C-ITS 구축 이후 배출가스 양은 소폭 증가한 것을 알 수 있었다.

프로젝트 기반 지속가능성 교육 프로그램의 개발과 적용 (Development and Application of a Project-based Sustainability Education Program)

  • 강석진;김진현
    • 한국초등과학교육학회지:초등과학교육
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    • 제43권1호
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    • pp.108-121
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    • 2024
  • 이 연구에서는 프로젝트 기반 학습 전략을 사용한 지속가능성 교육 프로그램을 개발하고 예비 교사를 대상으로 적용하여 그 효과를 분석하였다. 교육대학교의 4학년 학생 23명이 연구에 참여하였고, 사전 검사로 환경 관련 행동 및 태도 검사를 실시하였다. 지속가능성 교육 프로그램을 5주에 걸쳐 실시하였고, 학생들은 전기 절약 프로젝트를 각자 수행하였다. 사후 검사는 사전 검사와 같은 검사지를 사용하였고, 프로젝트에 적극적으로 참여한 아홉 명을 대상으로 개별 면담을 하였다. 면담 내용과 포트폴리오 및 결과 보고서를 심층적으로 분석하여 지속가능성 교육 프로그램의 효과와 원인에 관련된 하위 개념을 도출한 뒤 유목화하여 하위 범주를 설정하였다. 다음으로 하위 범주 사이의 관계 중 반복해서 나타나는 관계를 추출하여 잠정적인 설명 모형을 도출하였다. 연구 결과, 프로젝트 기반 지속가능성 교육 프로그램은 학생들의 친환경적 행동과 가치 및 태도를 긍정적으로 변화시켰다. 학생들의 친환경적 행동에 뚜렷하게 영향을 미친 원인은 '성공으로 얻은 성취감'이었다. 그리고 일부 원인은 가치 및 태도 측면을 매개로 학생들의 친환경적 행동에 간접적으로도 영향을 미치는 것으로 나타났다.

기업의 효율적인 리스크관리 방안 (The Strategy of Effectiveness Risk Management for Company)

  • 조원길
    • 정보학연구
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    • 제7권4호
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    • pp.103-117
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    • 2004
  • 최근 경영환경의 불확실성이 커짐에 따라 신규사업 분야 진출, 해외시장 개척 등에 따른 전략 수행상의 리스크, IT 관련 리스크 등 운영상의 리스크가 점점 커지고 있으며, 이러한 리스크의 범주도 확대되고 있다. 최근에 리스크에 대한 개념은 기업의 목적(objectives) 달성에 장애가 되는 요소는 모두 리스크의 범주에 포함시키고 있다. 좀 더 세부적으로 살펴보면 기업을 구성하고 있는 기능, 프로세스의 목적을 정의하고 목적달성에 장애가 되는 요인은 모두 리스크로 정의하고 있는 차원에서 본 논문은 우리나라 기업의 효율적인 리스크관리 방안을 살펴보는 것이다.

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시스템엔지니어링을 이용한 턴키방식 플랜트 건설계약의 기술적 위험요인 효과적 분석 및 관리 (An Effective Analysis and Management of Technical Risk to Turn-key based Plant Construction Contracts using Systems Engineering)

  • 홍대근;변희철;서석환
    • 시스템엔지니어링학술지
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    • 제10권2호
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    • pp.59-69
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    • 2014
  • In the bidding stage of turn-key based plant construction contracts, owners provide design and performance basis for contractors instead of giving design drawing. To win the bid for a plant construction, the contractors should be obliged to satisfy and ensure owners'requirements such as design and performance basis in a plant construction project, In other words, owners imposes technical risk of the design to the contractors by specifying responsibility for the analysis and verification of the plant construction. Thus, it is very important that contracters make accurate and realistic basic design plan in a short period of time. To deal with such a situation, we propose a systems engineering approach for the analysis and management of the technical risk. Specifically, we first: 1) Analyzes technical risk related with the plant design information for the bidders, followed by 2) Developing stakeholder requirements for the basic engineering design, and 3) System requirements for dealing with technical risk. Also, in this paper, we proposed converting method from MOE(Measure of Effectiveness) to MOP(Measure of Performance) in the risk analysis. To show the effectiveness of the proposed method, we carried out a case study.

자기주도적 탐구학습 프로그램의 교육적 효과와 개선방안에 관한 연구 - 대구광역시교육청의 '책쓰기' 교육 활동을 중심으로 - (A Study on the Effectiveness of an Independent Research Program: With Special Reference to 'Book Writing' Program of Daegu)

  • 김종성
    • 한국도서관정보학회지
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    • 제41권2호
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    • pp.81-106
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    • 2010
  • 이 연구는 초 중 고등학생들을 대상으로 하는 자기주도적 탐구학습 프로그램의 교육적 효과를 평가하고 개선 방안을 탐색하기 위한 것이다. 설문조사와 질적 자료를 통해 대구광역시교육청에서 2009년에 시행한 '책쓰기' 교육 활동에 대한 교사와 학생들의 만족도를 조사하였고 그와 관련된 제반 요인에 대해 검토하였다. 학생 스스로 주제를 선정하여 자료를 찾고, 다양한 자료를 활용하여 보고서로 만들고 책을 출판하는 '책쓰기' 프로그램에 대해 교사와 학생들은 어렵고 생소한 경험이었지만 성취감과 자기주도적 탐구학습의 가치를 발견한 것으로 드러났으며, 프로그램의 개선을 위한 몇 가지 과제가 부각되었다

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공학교육에 있어 특수목적 영어 교수법의 효과성 (Effectiveness of Teaching Engineering in English with Specific Purpose)

  • 이태식;레온하드 버놀드;장병철
    • 공학교육연구
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    • 제17권3호
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    • pp.22-33
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    • 2014
  • This paper presents a comparative study on the effectiveness of teaching an engineering course using English with Specific Purpose(ESP). A study was performed using student groups; one class using ESP, and one class conducted in English with an English text. The course conducted using ESP showed the greatest improvement in English writing and conversation, and the students reported a greatly increased confidence in their ability to function professionally using English. A self-assessment of each student was conducted before and after the courses. Prior to the course less than 10% in each group felt that they are able to: a) understand a textbook, b) write an email, c) generate a project report, or d) follow a lecture given in English. The survey at the end of the course showed that the ESP teaching style resulted in significant improvements in students ability and confidence with writing and speaking in English, whereas reading skills were similar for both groups. This is due to the ESP method, in which students are required to give presentations and keep journals in English. After a brief review of the ESP principles and a discussion of how they were implemented, the background data of the participants(students) are described. Finally, the end-of-semester survey highlights the efficacy of the ESP approach.