• 융합보안논문지
• /
• 제13권5호
• /
• pp.97-105
• /
• 2013

국가에서 추진하는 모든 프로젝트는 예산이라는 변수에 영향이 크다. 정확한 소요예산 판단불가로 프로젝트 추진 중에 추가적인 예산소요가 발생하여 사업의 중단 혹은 재검토 사례가 빈번히 발생하고 있다. 이는 프로젝트 소요제기단계 및 이를 획득하기 위한 선행연구단계에 제시된 시스템요구사항의 평가와 소요예산의 부정확성으로 기인한다고 평가된다. 시스템요구사항은 사용자가 작성하는 사용자 요구사항과 구별하여 사용자 요구사항을 바탕으로 획득조직에서 시스템의 기술적 요구사항으로 전환하는 것을 말하며 획득조직과 개발자 혹은 제작자 사이에 의사소통을 위한 것이다. 시스템 요구사항 수준은 프로젝트 규모를 결정하는데 중요한 요소로, 시스템요구사항에 대한 비용측면의 적정성 확인은 필수적이다. 그러나 프로젝트 비용요소가 복잡하고 각 요소별로 기준이 상이하여 비용추정이 쉽지 않고 추정된 비용의 오차율도 커서 활용에 어려움이 있었으며, 특히 시스템요구사항을 도출하는 프로젝트 초기단계에는 프로젝트와 관련된 세부자료의 부족으로 비용추정에 어려움이 있었다. 본 연구에서는 요구공학과 비용추정방법에 대한 이론적인 근거를 바탕으로 시스템요구사항 도출 후 비용추정방법을 활용하여 적정성을 검증하고 대안을 비교 후 최적안을 선정하는 아키텍처를 솔루션으로 제시하였고, 이를 위하여 활용 가능한 모수비용추정방법(Parametric Cost Estimating)를 토대로한 비용추정 전산도구인 SEER Cost-IQ를 소개하였다.

• Structural Engineering and Mechanics
• /
• 제71권2호
• /
• pp.139-151
• /
• 2019

In a project schedule, it is possible to reduce the time required to complete a project by allocating extra resources for critical activities. However, accelerating a project causes additional expense. This issue is addressed by finding optimal set of time-cost alternatives and is known as the time-cost trade-off problem in the literature. The aim of this study is to identify the optimal set of time-cost alternatives using a multiobjective teaching-learning-based optimization (TLBO) algorithm integrated with the non-dominated sorting concept and is applied to successfully optimize the projects ranging from a small to medium large projects. Numerical simulations indicate that the utilized model searches and identifies optimal / near optimal trade-offs between project time and cost in construction engineering and management. Therefore, it is concluded that the developed TLBO-based multiobjective approach offers satisfactorily solutions for time-cost trade-off optimization problems.

• 신재생에너지
• /
• 제8권3호
• /
• pp.38-46
• /
• 2012

Enhanced Geothermal System (EGS) among geothermal system types enables to produce sustainable energy even in non-volcanic region while conventional geothermal energy has been restricted to obtain only from hot and permeable formation such as in volcanic regions. Successful EGS project in terms of economy, however, can be expected only when the project is managed effectively considering most of influencing factors (e.g., tangible and intangible resources, cost, time, risks, etc.). In particular, well construction is of the utmost importance in geothermal project as it dominantly influences on time and cost in the whole project. Therefore, when it comes to viable geothermal project without abundant experience, managing drilling economically and efficiently is inevitable. In this study, a project management system for well construction in geothermal project based on project control system including work breakdown structure and cost account was developed to predict and assess the performance of drilling and to visualize the progress.

• 국제학술발표논문집
• /
• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
• /
• pp.168-175
• /
• 2011

Construction accidents are major problem in Turkish Construction industry and especially fatally rates are very high. Current legislative system on occupational safety in Turkey enforces employers to implement safety measures as well as safety management systems. However level of consciousness in the industry is unsatisfactory and safety are perceived as extra cost and unnecessary expenditure. Moreover, especially in small residential building constructions which have a big share in the industry and unfortunately safety measures to mitigate or abate construction risks do not exist. The study focuses on small residential building construction sites and in the scope of this study, thirty building projects are examined. For each building project, project cost including labour and material costs, service and consultancy costs for mechanical, electrical systems as well as architectural and structural services, costs for supervision and finally general expenditures for construction site facilities were calculated. On the other hand, occupational safety costs for personal protective equipment, collective protective measures, consultancy and training were determined. Work breakdown structures were established and for each work item firstly occupational risks were evaluated and furthermore according to risk scores safety measures to be implemented were defined and related costs were calculated. The study gave results for total safety cost on average, in terms of percentage of total project cost (3.73% of total project cost), safety cost per man-hour (0.40 USD) and safety cost in terms of unit construction area (11.60 USD per square meter). Since safety management is a part of whole project management process, study gives suggestions and techniques to calculate safety costs and implement safety measures as a part of project management service for professionals. Authors believe that suggested approach may easily developed by the usage of more data to establish a model for estimation not only for building construction sites but also for all construction projects.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2001년도 학술대회지
• /
• pp.379-382
• /
• 2001

국내 건설프로젝트는 공정관리와 원가관리의 이원적 관리체계를 가지고 있으며, 공정관리는 아직 그 체계가 미흡하고 상대적으로 관리의 중요도가 낮게 평가되고 있는 현실이다. 현재의 원가위주의 관리체계로는 프로젝트 진행과정상의 수행성과를 정확히 파악하기 어려우며, 이에 따라 공기지연, 공사비초과, 생산성저하 둥의 문제가 야기되고 있다. 따라서 프로젝트를 계획된 기간과 비용안에 효율적으로 완성하기 위해서는 비용과 일정의 통합관리를 통한 정확한 실적관리기법의 도입이 요구된다. 이에 본 연구에서는 실공정을 중심으로 한 실적관리를 통해 프로젝트의 성과를 정확히 파악하여 성공적 프로젝트 수행을 위한 방안으로 비용과 일정의 통합관리를 통한 실적관리 모델을 제시하였다.

• 국제학술발표논문집
• /
• The 5th International Conference on Construction Engineering and Project Management
• /
• pp.475-478
• /
• 2013

To carry out a one-off construction project successfully, effective and accurate early cost estimation is crucial, especially during the conceptual stage where very limited minimum information of construction project is given. As the level of accuracy of the early cost estimation has huge impacts on precise budgeting and cost management of a project, in other words, reducing the risk of a project, cost must be managed with special awareness. In an effort to improve the estimate accuracy of cost during the conceptual stage, this research introduces a Parameter Impact (PI) which can quantify weights of parameters and rank them; and PI development derived from the principle of impulse in physics is explicated. For a case study, 76 public apartment building cases in Korea are analyzed. To examine the validity of the proposed PI, a validation in terms of CBR applicability test and estimate accuracy comparisons using 10-nearest neighbor cases are carried out. The validation results support that the suggested PI can be applied in quantifying the weights of the parameters and CBR method for early cost estimation.

• 한국경영과학회지
• /
• 제20권1호
• /
• pp.85-99
• /
• 1995

Increasingly, risk analysis is becoming important ingredients in achieving the successful implementation and application in the area of the project management. The project management system is designed to manage or control the project resources on a given activity within time, cost and performance so called TPPM (Total Productive Project Management). In this research, a risk analysis model misproposed to identify potential problem areas, quantify the risks, and generated the chice of the action that can be taken to reduce the risk. In addition two analysis models are proposed : 1) risk factor model and 2) network simulation model using VERT (Venture Evaluation and Review Technique ). The objective of the remodels is to estimate the schedule, cost performance risks. These proposed quantitative models for project risk analysis are proving its value for the project managers who need to assess the risk of changes in cost, schedule, or performance. The proposed models will be used in the area of project selection, evaluation and the allocation of project resources.

• Journal of Construction Engineering and Project Management
• /
• 제4권3호
• /
• pp.53-59
• /
• 2014

Project managers are responsible to conduct project on time with least amount of costs and the most possible quality with respect to shortage of resources and environmental certainties. They have to make the best decision to reach such conflicting objects. In this study the project scheduling with multi goals-multi modes was planned in fuzzy conditions under resource constraints and expanded by fuzzy goal programing (FGP). The project cost was calculated by the price of renewable resources and the quality criteria were evaluated by the quality function deployment method (QFD). Finally the model was verified by a construction case study with 22 activities along with solving by GAMS. The results showed that this model could provide a systematic framework to facilitate the decision making process and made the project managers to be able to schedule the project closer to reality.

• 한국건설관리학회논문집
• /
• 제24권3호
• /
• pp.52-61
• /
• 2023

Conflicts in a construction project not only make negative impacts on project performance such as schedule delay or cost overrun but also require social cost to resolve the conflicts. Although the conflict needs a preemptive management because a conflict usually begins with a complaint, existing studies have focused on conflict resolution after it occurs. This study identifies and categorizes complaints which mainly appear in the construction projects. Those complaints were evaluated and quantified in terms of occurrence frequency and potential to conflict through a questionnaire survey with industry experts. Using the survey results, this study examines the characteristic of complaints in linear project and clustered project, and analyzes what kind of complaints occur by project type. As the results, this study derives the complaints with high potential to the conflicts that should be managed first during managing a construction project in each project type.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2007년도 정기학술발표대회 논문집
• /
• pp.728-731
• /
• 2007

In-planned duration and cost at project closing are the two of criteria of successful project and successful project management. In Vietnam, regularly, construction projects are delayed and their costs are overrun. This research employed a questionnaire survey to elicit the causes of this situation by interviewing 87 Vietnamese construction experts. After processing data, 21 causes of delay and cost overruns appropriate with building and industrial project in construction stage were inferred and ranked. Spearman's rank correlation tests showed that there're no differences in the viewpoints between parties in project.