• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.1-6
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• 2013

Concrete construction requires utilization of many temporary facilities such as formwork, shoring, and scaffolding. Appropriate use of these temporary facilities greatly impacts the quality, cost, schedule, and safety of concrete construction. The current practice in design and planning of temporary facilities is often manual, error-prone, and re-active based on construction site layout, status, and progress in the field. Early design and planning of temporary facilities for concrete construction using Building Information Modeling (BIM) technology offers a potential solution. Although some commercially-available software exists that assists in the generation of temporary facility designs, the construction industry lacks tools that support detailed planning and design of many other temporary facilities. This research presents our early work in automating the design and planning of temporary facilities utilizing BIM. Algorithms were developed to automatically assess geometric conditions of work space to detect required temporary facilities and design them. The proposed methodology was implemented in a test model. By automatically incorporating temporary facilities into BIM, more realistic construction models can be created with less effort and errors. Temporary facilities-loaded models can finally be used for communication, bill of materials, scheduling, etc. and as a benchmark for field installation of temporary formwork, shoring, and scaffolding systems.

• 한국컴퓨터산업학회논문지
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• 제5권1호
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• pp.9-18
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• 2004

성공적인 프로젝트 계획은 활용 가능한 일정과 더불어 프로젝트를 개발하는데 요구되는 인력을 얼마나 정확히 추정하느냐에 달려있다. 현존하는 소프트웨어 인력 추정 모델들은 생명주기 전반에 걸쳐 투입되는 총 인력과 단위시간당 소요되는 인력 분포를 제공한다. Putnam의 Rayleigh 모델이나 Phillai et al.의 Gamma 모델 모두 소프트웨어 개발이 종료되는 시점에서 투입되는 인력이 절정에 도달한다는 가정하에 모델을 제시하였다. 이는 개발완료시점까지 40%의 인력이 투입되며, 나머지 60%는 유지보수 단계에 투입됨을 의미한다. 그러나 Warburton은 실제 프로젝트는 대부분의 인력이 개발에 투입되고 설계가 종료된 시점에서 투입인력 규모가 절정에 도달하며, 유지보수에는 단지 적은 규모의 인력만이 소요됨을 관찰하였다. 따라서, 제안된 기존 모델들은 실제 프로젝트에 적용하는데 문제가 발생한다. 이러한 문제점을 해결하기 위해 본 논문은 투입인력 절정 시점 모수를 고려하지 않는 시그모이드 모델을 제시하였다. 제시된 모델을 실제 데이터에 적용하여 향상된 성능을 보였다 따라서 제안된 시그모이드 모델은 소프트웨어 개발주기 동안 투입되는 인력 분포를 추정하는데 있어서 Rayleigh나 Gamma 모델의 대안으로 적용이 가능하다.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2002년도 Proceedings
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• pp.506-508
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• 2002

As an advancement of medical imaging modalities and analyzing software with multi-function, active researches to acquire high contrast and high resolution image being done. In recently, development of medical imaging modalities like as Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) is aiming to display anatomical structure more accuracy and faster. Thus, one of the important areas in CT today is the use of CT scanner for the quantitative evaluation of 3-D reconstruction images from 2-D tomographic images. In CT system, the effective slice thickness and the quality of 3-D reconstructed image will be influenced by imaging acquisition parameters (e.g. pitch and scan mode). In diagnosis and surgical planning, the accurate distance measurements of 3-D anatomical structures play an important role and the accuracy of distance measurements will depend on the acquisition parameters such as slice thickness, pitch, and scan mode. The skull phantom was scanned with SDCT for various acquisition parameters and acquisition slice thicknesses were 3 and 5 mm, and reconstruction intervals were 1, 2, and 3 mm to each pitch. 3-D visualizations and distance measurements were performed with PC based 3-D rendering and analyzing software. Results showed that the image quality and the measurement accuracy of 3-D SDCT images are independent to the reconstruction intervals and pitches.

• International journal of advanced smart convergence
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• 제10권3호
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• pp.257-278
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• 2021

As the definition of the vendor-oriented implementation method, which was utilized in adopting an ERP system, has been centered around the project construction business, it was difficult for the EPR adopting organization to systematically prepare ERP projects and have enough deliberative opportunities to change-related policies. Furthermore, this method does not have a fully standardized construction process. Accordingly, by defining an organization that wants to adopt an ERP system as a customer, this paper develops the customer-based ERP construction process framework that assists both customers and developers who construct the system. For this purpose, this paper reviews the previous research and collects the construction processes of the commercial ERP SW vendor and ERP construction cases while proposing the three-layer process framework to construct ERP through the KJ method. The ERP process framework consists of 7 processes, 32 activities, 141 tasks while providing definitions for concepts of each component. Furthermore, the proposed processes and phases were set in order of the recommended execution, while the activities were suggested as an open-ended type so that the application and usability can be increased and polished by reflecting experts' opinions. The contribution of this study is to standardize the ERP project process by transforming the previous supplier-based ERP construction method into the customer-based one while providing important procedure and activity frameworks that apply to diverse ERP solutions per vendor. At the same time, this study provides an theoretical foundation to develop the construction process for the customer -based Cloud ERP. In practice, At the beginning of the ERP system construction project, it provides communication or process tailoring tools for the stakeholder.

• 농촌계획
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• 제14권3호
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• pp.99-110
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• 2008

Tourist destination remodeling project is the tourist destination activation program to promote underdeveloped tourist destination that the Ministry of Culture and Sports has been implementing as a pilot program since 2005. Since previous tourist destination development programs focused on developing facilities, they could not quite cope with the changes in the tourism paradigm. Especially for caves, they could not escape from the simple sightseeing for the characteristics of the resource were fit to the caves. These results failed to meet tourist demands to experience and participate that the number of tourists is continuously decreasing. To cope with the circumstances, the government introduced a pilot program, a comprehensive tourist destination reorganization plan designed to comprehensively promote the tourism contents development (software) that can differentiate the region such as the tourism activation programs, tourist destination management and operation system reorganization (humanware) along with the repair of facilities (hardware project). This study emphasized the participation of residents who are the actual subject of management and operation of tourist facilities and programs in the course of establishing the master plan for remodeling for Gossi Cave that it can be used as the reference for establishing remodeling plan based on resident participation in the future.

• 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.

• 로봇학회논문지
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• 제16권4호
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• pp.327-335
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• 2021

In this paper, we propose an embedded robot system based on "ROS2 on Yocto" that can support various robots. We developed a lightweight OS based on the Yocto Project as a next-generation robot platform targeting cloud robotics. Yocto Project was adopted for portability and scalability in both software and hardware, and ROS2 was adopted and optimized considering a low specification embedded hardware system. We developed SLAM, navigation, path planning, and motion for the proposed robot system validation. For verification of software packages, we applied it to home cleaning robot and indoor delivery robot that were already commercialized by LG Electronics and verified they can do autonomous driving, obstacle recognition, and avoidance driving. Memory usage and network I/O have been improved by applying the binary launch method based on shell and mmap application as opposed to the conventional Python method. Finally, we verified the possibility of mass production and commercialization of the proposed system through performance evaluation from CPU and memory perspective.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.598-601
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• 2003

건축공사의 규모가 대형화, 복잡화, 다양화 되면서 여러 현장에서 공사수행에 따른 많은 정보가 발생하여 본사로 보고 되고 있다. 이러한 정보들 중에서 매개 현장 및 다중 현장을 동시에 관리하기 위해서는 필요정보만을 추출하여 경영진이 의사결정을 할 수 있는 지원체계의 필요성이 증가하고 있다. 하지만 중견건설업체의 경우 대기업과 비교할 때 본사 조직의 미비 및 관리업무 시스템이 취약하여 다중현장 관리가 어려운 실정이다. 특히 이러한 현장관리에 있어서 자원관리는 프로젝트 관리자의 중요한 관리대상이다. 그러나 자원계획을 일정정보와의 연계가 없이 주로 담당자의 경험과 판단에 근거하여 수립하기 때문에 일정이 변경될 때마다 계획을 수작업으로 수정해야하는 실정이며, 이로 인한 불필요한 공기지연이나 재고비용이 발생하고 있다. 본 연구에서는 중견건설업체가 다수 현장을 동시에 관리할 수 있도록 현장의 작업일보와 공정관리 소프트웨어의 연계를 통한 자재소요계획모델을 제시한다.

• International journal of advanced smart convergence
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• 제8권3호
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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.

• 정보처리학회논문지D
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• 제14D권6호
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• pp.641-648
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• 2007

요구사항이 빈번히 변경되는 동적 비즈니스 시스템 프로젝트를 확정가로 개발할 경우, 개발과정에서 발생하는 요구사항의 변경에 따른 추가 소요 비용으로 인해 확정가 범위 이내로 개발을 완료하는 것은 거의 불가능하다. 확정가 범위 이내에서 성공적으로 프로젝트를 완료하기 위해서는 요구사항 변경 규모와 이에 기반하여 개발이 되지 않아도 되는 옵션 요구사항의 비율을 관리하여야 한다. 이에 대해 Bhagwat는 요구사항 변경이 구축단계에서만 발생한다고 한정하였다. 또한, 소프트웨어 개발비용, 구축단계 소요 비용과 요구사항 변경에 소요되는 추가 비용이 동일하다고 가정함으로써 요구사항 변경 비율과 옵션 요구사항의 비율 유도의 모순을 보였다. 본 논문은 요구사항 변경은 정련단계와 구축단계에서 발생한다고 가정하였다. 또한, 소프트웨어 개발비용, 구축단계 소요 비용과 요구사항 변경 비용간에는 차이가 발생한다고 가정하였다. 그 결과 확정가 대비 요구사항 변경에 따른 추가 소요 비용과 개발이 되지 않아도 되는 옵션 요구사항의 비율도 보다 현실성을 반영하는 결과를 얻을 수 있었다.