• Title/Summary/Keyword: cost optimizing

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A Study on the Cost Estimates for Optimization in the Free-Form Building Facade (비정형 건축물 파사드의 개산견적을 위한 최적화에 관한 연구)

  • Lim, Jang-Sik;Ock, Jong-Ho
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2013.05a
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    • pp.133-135
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    • 2013
  • The most difficult process in the construction of free-form buildings is to manufacture and construct exterior panels designed in a complex way. The façade of the free-form buildings include flat-panels, one-way curvature-panels, and bi-directional curvature panels. To construct these forms, it is necessary to go through the process of optimizing. But as for the optimizing technologies, BIM-specializing companies exclusively protect those technologies, so small construction companies have difficulty in rough estimates. Therefore, this study was aimed to provide the basic data in making the rough estimates of free-form buildings by carrying out the optimizing process for the façade of Dongdaemun Design Plaza and conducting the rough estimates according to the stage of production methods and optimization.

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Optimizing Construction Alternatives for Repetitive Scheduling (반복공정 최적 공법대안 선정 방법)

  • Park, Sang-Min;Lee, Dong-Eun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.132-133
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    • 2015
  • Efficient scheduling and resource management are the key factor to reduce construction project budget (e.g., labor cost, equipment cost, material cost, etc.). Resource-based line of balance (LOB) technique has been used to complement the limitations of time-driven scheduling techniques (e.g., critical-path method). Optimizing construction alternatives contributes cost savings while honoring the project deadline. However, existing LOB scheduling is lack of identifying optimal resource combination. This study presents a method which identifies the optimal construction alternatives, hence achieving resource minimization in a repetitive construction by using genetic algorithm (GA). The method provides efficient planning tool that enhances the usability of the system.

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Optimizing Construction Alternatives for Scheduling Repetitive Units

  • Park, Sang-Min;Lee, Dong-Eun
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.158-160
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    • 2015
  • Efficient scheduling and resource management are the key factor to reduce construction project budget (e.g., labor cost, equipment cost, material cost, etc.). Resource-based line of balance (LOB) technique has been used to complement the limitations of existing time-driven scheduling techniques (e.g., critical-path method). Optimizing construction alternatives contributes to cost savings while honoring the project deadline. However, existing LOB scheduling is lack of identifying optimal resource combination. This study presents a method which identifies the optimal construction alternatives, hence achieving resource minimization in a repetitive construction by using genetic algorithm (GA). The method provides efficient planning tool that enhances the usability of the system.

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Optimization for Transportation Routing on Logistics Network by Simulation Analysis (시뮬레이션 분석을 통한 물류거점체계하의 수배송 최적화 연구)

  • Kim, Young-Chul;Seong, Haeng-Ki;Hwang, Dae-Sung;Kim, Jung-Hyun;Lee, Hae-Uk;Kang, Kyung-Sik
    • Journal of the Korea Safety Management & Science
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    • v.14 no.4
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    • pp.177-184
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    • 2012
  • Logistics cost of domestic company has been improved continuously and annually, it is still higher than other main comparative countries. So, in this study, as optimizing the logistic network of distribution, it was trying to find methods decreasing logistics cost and storage cost, which occupies 86% of logistics cost of companies. through the efficiency of transportation and delivery routing, it could be also possible to decrease the logistics cost. And, it is also checked to find the logistics cost could be decreased by 10% by optimizing the routes of transportation and delivery, improving the transportation mode, etc.

Application of Systems Engineering based Design Structure Matrix Methodology for Optimizing the Concept Design Process of Naval Ship (함정 개념설계 프로세스 최적화를 위한 시스템엔지니어링 기반의 설계구조행렬 방법론 적용)

  • Park, Jinwon
    • Journal of the Society of Naval Architects of Korea
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    • v.56 no.1
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    • pp.1-10
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    • 2019
  • Naval ship design and related other activities can be characterized by the complexity of the interactions among products, activities, and disciplines. Such complexities often result in inferior designs, cost overrun, and late-delivery. Hence there exist tremendous interests in both improving the design process itself and optimizing the interactions among design activities. This paper looks at the complexity of designing naval ships thereby leading to the innovation of current ship design practices using design structure matrix. It can be used to induce the optimal ordering of design activities as well as identify sources of complexities. The method presented here identifies coupled design activities useful for reducing the complexity of naval ship design as well as optimally reordering design activities. This paper recommends the use of design structure matrix method suitable for numerically optimizing the concept design process of naval ship, and reducing cost and time required in designing naval ships by modeling and analyzing the design activities and engineering tasks, defined in systems engineering planning documents.

Optimizing Design for Rudder Horn (Rudder Horn 최적화 설계 방안)

  • Park, Sung-Geun
    • Special Issue of the Society of Naval Architects of Korea
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    • 2006.09a
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    • pp.77-80
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    • 2006
  • In recent booming up of the ship building market, the supplying of large scale casting is difficult to keep the delivery schedule for ship yard because of the restrict manufacturer in Korea. And also, it is main cause to rise-up the cost of castings. This paper describes the outline of guidance of optimizing design for Rudder Horn Casting to reduce the risk of the delivery problem to ship yard.

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New Retention and Drainage Polymer For Carton Board and Newsprint

  • Lee, Woo-Suk;Noh, Jae-Hoon;Hughes, David
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • 2006.06b
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    • pp.413-415
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    • 2006
  • In this article, we tried to find out the potential of new PVAm (Polyvinylamine) Polymer for optimizing Retention and Drainage system. From the mill experimental in Carton board mill, we could find out PVAm can reduce a significant chemical cost with preserving Drainage. Another case of Newsprint laboratory survey, we could find out the formation benefits from optimizing PAM system to PAM + PVAm dual system.

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OPTIMAL POLICY NETWORKS

  • Lim, Jong Seul
    • Journal of applied mathematics & informatics
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    • v.31 no.5_6
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    • pp.907-912
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    • 2013
  • This paper focuses on the situation of optimizing the total cost with m given messages and n network nodes. Associated with each network node, a fixed cost is incurred to the receiver if at least one message is received. The mean and variance of the total costs are obtained. Normal approximation is used. Empirical results showed that the derived method reduces research work substantially.

A method for optimizing lifetime prediction of a storage device using the frequency of occurrence of defects in NAND flash memory (낸드 플래시 메모리의 불량 발생빈도를 이용한 저장장치의 수명 예측 최적화 방법)

  • Lee, Hyun-Seob
    • Journal of Internet of Things and Convergence
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    • v.7 no.4
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    • pp.9-14
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    • 2021
  • In computing systems that require high reliability, the method of predicting the lifetime of a storage device is one of the important factors for system management because it can maximize usability as well as data protection. The life of a solid state drive (SSD) that has recently been used as a storage device in several storage systems is linked to the life of the NAND flash memory that constitutes it. Therefore, in a storage system configured using an SSD, a method of accurately and efficiently predicting the lifespan of a NAND flash memory is required. In this paper, a method for optimizing the lifetime prediction of a flash memory-based storage device using the frequency of NAND flash memory failure is proposed. For this, we design a cost matrix to collect the frequency of defects that occur when processing data in units of Drive Writes Per Day (DWPD). In addition, a method of predicting the remaining cost to the slope where the life-long finish occurs using the Gradient Descent method is proposed. Finally, we proved the excellence of the proposed idea when any defect occurs with simulation.

The Processing Method of Nearest Neighbor Queries Considering a Circular Location Property of Object (객체의 순환적 위치속성을 고려한 최대근접질의의 처리방법)

  • Seon, Hwi-Joon
    • Journal of Korea Spatial Information System Society
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    • v.11 no.4
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    • pp.85-88
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    • 2009
  • In multimedia database systems, the nearest neighbor Query occurs frequently and requires the processing cost higher than other spatial Queries do. It needs the measurement of search distance that the number of searched nodes and the computation time in an index can be minimized for optimizing the cost of processing the nearest neighbor query. The circular location property of objects is considered to accurately select the nodes which will be searched in the nearest neighbor query. In this paper, we propose the processing method of nearest neighbor queries be considered a circular location property of object where the search space consists of a circular domain and show its characteristics. The proposed method uses the circular minimum distance and the circular optimal distance, the search measurement for optimizing the processing cost of nearest neighbor queries.

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