• 한국건설관리학회논문집
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• 제5권2호
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• pp.153-161
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• 2004

대형 건설프로젝트의 효율적인 운용을 위해서는 프로젝트 각 분야간의 유기적인 관리체계가 필수적이라 할 수 있다. 대형 건설프로젝트의 관리업무 중 일정, 비용, 자재, 노무관리업무는 상호 유기적 종합관리를 가능하게 하는 업무들이며 이들을 종합적으로 $분석\cdot평가$할 수 있는 데이터 중심의 정보교환체계가 필수적이라 할 수 있다. 건설프로젝트관리의 $비용\cdot일정관리$업무에서 발생하는 자료의 중요성 및 활용빈도는 타 관리보다 높으며 건설공사의 효과적인 수행에 미치는 영향이 크다. $비용\cdot일정$ 통합데이터 통합관리를 통한 건설프로젝트관리체계를 수립하는 것은 생산성 측면과 자료 활용도 측면에서 더욱 효과적이라 할 수 있다. 본 논문에서는 $비용\cdot일정$ 통합 데이터베이스를 기반으로 하고 비용, 일정, 자재, 노무관리에 관련된 현장업무 분석을 통하여 대형건설공사의 프로세스 및 데이터 모델링을 통한 제반 필요정보의 분석 및 구조화를 제시하고자 한다.

• 한국IT서비스학회지
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• 제10권4호
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• pp.191-204
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• 2011

Recently, many software companies are trying to improve the software quality and project outcome with more costs and efforts in development time. In the software convergence and integration environments, it is required efforts to gain high quality of software. In other words, it is required to utilize software engineering knowledge and technology for higher software quality and better software project productivity. The Software development productivity can be varied by software process capability according to building a framework for software development, selection and use of appropriate technology, human resource management. Software process capability will influence software project outcome which is the general opinion. This study provides empirical evidence about software engineering efforts and investment approach to lead software project performance. We measured the software engineering efforts by SW engineering level and analyzed the corelation between software engineering level and schedule deviation. And, we verified that this performance is affected by the size of software company. As a result, software process capability is important to build a infrastructure and develop systematically software project. The higher software engineering level can lead to improved software project performance.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.608-615
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• 2022

Construction projects are large-scale projects that require extensive construction costs and resources. Especially, scheduling is considered as one of the essential issues for project success. However, the schedule and resource management are challenging to conduct in high-tech construction projects including complex design of MEP and architectural finishing which has to be constructed within a limited workspace and duration. In order to deal with such a problem, this study suggests resource and sequence optimization using constraint programming in construction projects. The optimization model consists of two modules. The first module is the data structure of the schedule model, which consists of parameters for optimization such as labor, task, workspace, and the work interference rate. The second module is the optimization module, which is for optimizing resources and sequences based on Constraint Programming (CP) methodology. For model validation, actual data of plumbing works were collected from a construction project using a five-minute rate (FMR) method. By comparing actual data and optimized results, this study shows the possibility of reducing the duration of plumbing works in construction projects. This study shows decreased overall project duration by eliminating work interference by optimizing resources and sequences within limited workspaces.

• 경영과학
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• 제9권1호
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• pp.119-137
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• 1992

A two phase heuristic algorithm has been developed for the resolution of resource conflicts in a single project scheduling problem. Phase 1 of the algorithm generates a feasible schedule by repairing resource conflicts. Phase 2 finds local improvements in the schedule found in phase 1. Then, the algorithm has been applied to multi project and job shop scheduling. Computational results are compared with those of dispatching procedures. Index Terms-disjunctive constraints, heuristic algorithm, project scheduling, job-shop scheduling.

• 한국철도학회논문집
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• 제12권1호
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• pp.135-143
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• 2009

대부분의 개발 프로젝트는 목표 비용과 일정을 $40{\sim}200%$ 초과한다. 이러한 초과 현상은 계획시 업무를 과소 평가하거나 재작업을 고려하지 않음으로써 발생한다. 현재 국내에서 사용되는 대표적인 일정 계획/관리 기법(Gantt Chart, PERT/CPM 등)들은 재작업을 반영할 수 없다. 이 논문은 일정 계획시 보다 현실적인 일정 계획 값을 예측하기 위해서 재작업을 고려하는 방법을 고안하구 또한 과업의 과소평가를 방지하기 위해 수행시간의 불확실성을 확률변수로 나타내어 다루기 위해서 시뮬레이션을 수행하여 최종 완료 날짜의 예상치와 분산도를 계산하는 방법을 제안한다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.495-499
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• 2003

본 연구는 대형 건설사업의 공기 및 공정계획 적정성 검증에 있어서 Bar Chart, CPM 등 기존 공정계획 기법의 한계를 극복하기 위한 대안으로 시뮬레이션 기법의 효용성을 검증하기 위한 연구를 수행하였다. 이를 위하여 현재 한국 수자원공사에서 추진 중에 있는 시화 멀티테크노 밸리 사업을 대상사업으로 선정하였다. 시화 테크노밸리 단지조성 사업은 대규모 사업으로 많은 장비가 동시에 투입되어 대량의 교통 혼잡을 유발할 수 있는 건설 프로젝트이다. 특히 시화 멀티 테크노벨리 현장은 시화공단과 대부도 관광단지를 인접하고 있어 이미 상당한 규모의, 기존 교통량으로 인하여 매우 혼잡한 지역이다. 따라서 본 연구에서는 기존 교통량에 추가적으로 공사차량이 증가할 경우 공기 내에 공사를 마칠 수 있는지에 대한 평가를 위한 시뮬레이션 모델을 구축하고, 적정 공기의 검증 및 공정계획 수립을 위한 방안을 제시 하였다.

• 품질경영학회지
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• 제50권2호
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• pp.265-286
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• 2022

Purpose: The time and cost of a project activity exists in a selected mode and there is a quality level for the selected mode, and the time and cost of the current activity is determined by the quality level of the preceding activity. When an activity is a predecessor activity of an activity, it is characterized as a trade-off problem in which the time and cost of the activity are determined according to the quality level of the activity. Methods: A neighbor search heuristic algorithm obtains a solution by (1) randomly determining the mode, quality level, and assignment order for each activity. (2) get a solution by improving the solution by changing the possible modes and quality levels; (3) to find a solution by improving the solution from the point where it is feasible to advance the start time. Here, Case[1] is a method to find the optimal solution value after repeating (1). Case [2] is a method for finding a solution including (1) and (2). Case [3] refers to a method for finding solutions including (1), (2), and (3). Results: It can be seen that the value of the objective function presented by the algorithm changes depending on how the model of the heuristic algorithm is designed and applied. In other words, it suggests the importance of algorithm design and proves the importance of the quality problem of activities in the project schedule. Conclusion: A study significance of the optimization algorithm and the heuristic algorithm was applied to the effect of the quality of the preceding activity on the duration and cost of itself and the succeeding activity, which was not addressed in the project schedule problem.

• 한국군사과학기술학회지
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• 제14권5호
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• pp.850-858
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• 2011

The risk analysis plays an important role in weapon system acquisition project due to uncertainties in the acquisition process. But in domestic, studies on risk analysis are insufficient and risk cost is not included in acquisition budget in policy. Therefore, in this study, we suggest a method that measures risk or success probability of project using the stochastic model. In particular, in order to calculate the success probability, we apply the joint probability distribution model of cost and schedule that are critical factors influencing the project risk. And also we verify the applicability of this model in Korean defence industry environment through case studies.

• 기술혁신연구
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• 제16권1호
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• pp.107-139
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• 2008

We studied how to achieve successful implementation of massive research and development projects requiring collaboration among industries, universities and government-supported research institute. We have set up an engineering process innovation model to be deemed most adequately for all practical purposes, relying on the theoretical studies on the merits and analysis of the effect of the information system based on Milestone Management, Work Breakdown Structures and Web, which is known to be effective for research project (schedule) management and the objective management, and implemented a real-world web-based project objective management system. After a review of various R & D Project Schedule Management methods, we found that this information system was very compatible with project objective management. This project objective management information system carries out research and development projects effectively and efficiently, getting together in cyber-space and sharing information, and has been equipped with an Early Warning Subsystem to allow for pre-analysis and timely response to potential problems arising from the course of the project. The system also contains an Executive Information System that in real time, automatically provides the management information required by managers with the rate of project progress (achievement, fulfillment and delay). Lastly, actual progress can be cross-checked through both on-line objective management on the web-based information system and design review meeting held on site, to improve the efficiency and validity of the information system. Moreover, overall effect was analyzed through questionnaires on how well the system and generated information meet requirements and on the ultimate impact of the system upon objective management and communication. The questionnaire on the system effect revealed that the information system was useful to objective management and communication, and that the quality of the system was more than acceptable as well.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2006년도 춘계공동학술대회 논문집
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• pp.373-378
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• 2006

Recently the technical advances and complexities have generated much of the difficulties in managing the project resources, for both scheduling and costing to accomplish the project in the most efficient manner. The project manager is frequently required to render judgments concerning the schedule and resource adjustments. This research develops an analytical model for a schedule-cost and risk analysis based on visual PERT/CPM. We used a three-step approach: 1) in the first step, a deterministic PERT/CPM model for the critical path and estimating the project time schedule and related resource planning and we developed a heuristic model for crash and stretch out analysis based upon a time-cost trade-off associated with the crash and stretch out of the project. 2) In second step, we developed web-based risk evaluation model for project analysis. Major technologies used for this step are AHP (analytic hierarchy process, fuzzy-AHP, multi-attribute analysis, stochastic network simulation, and web based decision support system. Also we have developed computer programs and have shown the results of sample runs for an R&D project risk analysis. 3) We developed an optimization model for project resource allocation. We used AHP weighted values and optimization methods. Computer implementation for this model is provided based on GUI-Type objective-oriented programming for the users and provided displays of all the inputs and outputs in the form of GUI-Type. The results of this research will provide the project managers with efficient management tools.