• 제목/요약/키워드: Procurement engineering

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건설공사 적시생산(Just-ln-Time)을 위한 조달시스템 개발 - 콘크리트 타설 공사를 중심으로 - (Development of the procurement system for Just-in-Time Building Construction)

  • 신봉수;김창덕
    • 한국건설관리학회논문집
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    • 제5권6호
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    • pp.235-244
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    • 2004
  • 도심지의 대형 공사를 그것도 짧은 공기 내에 수행함에 있어 가장 중요한 과제로 부각되는 것은 건설 주요 자원의 효율적인 관리이다. 즉 자재, 인원, 장비 등의 적기적소 조달이 주요 관리 항목이 되고 있다. 또한, 자원의 적기적소 조달을 위한 생산 단계별 생산주체간의 효율적인 정보의 교환은 성공적인 공사 수행에 절대적인 영향을 끼치게 된다. 따라서 이러한 정보를 효율적으로 관리하여 주요 자원을 조달, 운반, 양중, 적치, 설치 각 단계별로 관리할 수 있도록 하는 주요 자원 관리 시스템의 개발이 필수적이다 본 연구에서는 자동차 제조 산업 등 타 산업분야에서 성공적으로 사용된 적시생산의 기본적인 원리와 정보전달기법, 즉 간판시스템의 기본개념을 응용하여 건설프로젝트 자원정보관리시스템을 개발하였다. 또한, 이 시스템을 콘크리트 타설 공사에 적용하였다. 현장의 콘크리트 공사 흐름을 분석한 후, 가치흐름맵핑(VSM)을 통해 정보관리 개선 후 개선모델(FSM)을 제시하고, 이를 실제 초고층주상복합 건물현장의 자원정보관리에 적용하였다. 또한 현장 적용 시 도출된 적용성 등 문제점을 보완하여, 시스템의 추후 사용성을 제고하였다.

다항목 검사장비를 위한 COO 모형 연구 (Cost of Ownership Model for the Inspection Equipment of Multiple Quality Attributes)

  • 손소영;문형욱;홍철기
    • 대한산업공학회지
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    • 제27권3호
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    • pp.297-304
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    • 2001
  • Procurement decisions for inspection equipment are often made heavily based on the initial purchase price instead of the effects of inspection cost, equipment calibration and utilization over the lifetime. Cost of ownership(COO) models that take into account all of these cost factors together have been developed focusing on a single quality characteristic. In modern manufacturing environment, inspection equipment often can deal with more than one quality characteristic simultaneously. In this paper, we propose the revised COO model for the economic evaluation of the inspection equipment that can accommodate multiple quality characteristics. We also employ an engineering economy model to compare equipments with different life span. Software is developed for handy comparison of the COO of alternative equipments along with sensitivity analysis far the optimal procurement decision.

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Detecting Red-Flag Bidding Patterns in Low-Bid Procurement for Highway Projects with Pattern Mining

  • Le, Chau;Nguyen, Trang;Le, Tuyen
    • 국제학술발표논문집
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    • The 9th International Conference on Construction Engineering and Project Management
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    • pp.11-17
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    • 2022
  • Design-bid-build (DBB) is the most common project delivery method among highway projects. State Highway Agencies (SHAs) usually apply a low-bid approach to select contractors for their DBB projects. In this approach, the Federal Highway Agency suggests SHAs heighten contractors' competition to lower bid prices. However, these attempts may become ineffective due to collusive bidding arrangements among certain contractors. One common strategy is the rotation of winning bidders of a group of contractors who bid on many of the same projects. These arrangements may also be specific to a particular region or vary in time. Despite the practices' adverse effects on bidding outcomes, an effective model to detect red-flag bidding patterns is lacking. This study fills the gap by proposing a novel framework that utilizes pattern mining techniques and statistical tests for unusual pattern detection. A case study with historical data from an SHA is conducted to illustrate the proposed framework.

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MEDIATION MECHANISM FOR CONSTRUCTION DISPUTE RESOLUTION IN TAIWAN

  • Chun-Yi Hwang;Nie-Jia Yau
    • 국제학술발표논문집
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    • The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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    • pp.357-363
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    • 2011
  • Mediation has long been praised as one of effective dispute resolution methods in the area of construction law. Article 85-1 of the Taiwan Government Procurement Act was amended and promulgated by presidential decree on July 4, 2007. The second paragraph of the Article elaborates explicitly, "In the event that the application for mediation referred to in the preceding paragraph is made by the supplier, the agency may not object to such application." Beyond that, if an unsuccessful mediation of a construction dispute is due to the agency's disagreeing with the proposal or resolution for mediation proposed by the Complaint Review Board for Government Procurement ("CRBGP"), the agency may not object to the arbitration filed by the supplier. It undoubtedly reinforces the importance of the mediation-arbitration procedure. Accordingly, this paper elaborates on the mediation mechanism in Taiwan in the framework of construction disputes first. After that, dispute resolution of a local public work case is provided to demonstrate the practice of construction mediation in Taiwan. Lastly, this study proposes suggestions on applying mediation to ease similar subsequent cases.

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자동차 조립공정 부품공급 작업자별 부하밸런스 평준화 알고리즘 연구 (A Study on the Improvement of Load Balance for Materials Supply Worker in Automobile Assembly Line)

  • 장정환;장청윤;전욱;조용철;김유성;배상돈;강두석;이재웅;이창호
    • 대한안전경영과학회지
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    • 제18권4호
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    • pp.107-114
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    • 2016
  • The efficiency of the purchasing and procurement logistics is important in automotive industry. The rationalization of production system is directly impact on productivity and quality. For this reason importance of logistics is high. Despite we are continuously making effort, our country are still below the level than developed country on logistics efficiency. Rising labor costs is an important factor in increasing logistics costs. So workforce reduction in logistics department is a large part. We deal with A-company inbound logistics, especially procurement logistics in automotive logistics as research object. So in this study we do research on work load balance about workers. We do research on 1,475 kinds of components in procurement process. We applied work load balance algorithm on chassis, final, sequence, trim warehouses workers. According to number of workers and average M/H, algorithm is applied in two ways. After applied work load balance algorithm we reduced numbers of workers from 28 to 20 and improved worker load balance rate from 47.1% to 93.7%.

A Fuzzy Multi-Objective Linear Programming Model: A Case Study of an LPG Distribution Network

  • Ozyoruk, Bahar;Donmez, Nilay
    • Industrial Engineering and Management Systems
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    • 제13권3호
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    • pp.319-329
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    • 2014
  • Supply chain management is a subject that has an increasing importance due to the developments in the global markets and technology. In this paper, a fuzzy multi-objective linear programming model is developed for the supply chain of a company dealing with procurement, storage, filling, and distribution of liquefied petroleum gas (LPG) in Turkey. The model intends to determine the quantities of LPG to be procured, stored, filled to cylinders, and transported between the plants and demand centers for six planning periods. In this model, which aims to minimize both total costs (sum of procurement, storage, filling, and transportation costs) and total transportation distances, demand quantities of the main demand centers and decision maker's aspiration levels about objective functions are fuzzy. After comparing the results obtained from the model with those obtained by using different methods, it is concluded that the proposed method can be applied to real world problems practically and it may be used in this type of problems in order to generate an efficient solution.

CAD 시스템과 분산형 건축부품 데이터베이스를 이용한 프로세스 모델에 관한 연구 (Study of Process Model Using CAD System and Distributed Building Component Database)

  • 박현수
    • 한국CDE학회논문집
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    • 제7권1호
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    • pp.66-73
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    • 2002
  • The purpose of this study is to propose a new process model for architects and suppliers in AEC(Architectural, Engineering and Construction) industry, which comes from its utilization of a distributed database. Information used by participants of this process is not held in one singular application sewer, but in tile databases of multiple participants. This study addresses the problem of coping with dynamic information changes that architects face when designing with increasingly time-sensitive product information from multiple suppliers. It also describes the new distributed architecture for design representation, and outlines a corresponding process model to address the needs architectural designers during design and procurement phases. The feasibility of the process was tested in a prototype system that combines existing technologies, which allows for an objects transfer from the Web to the CAD application.

A DECISION SUPPORT MODEL FOR PROCUREMENT OF REUSABLE MATERIALS IN MULTIPLE PROJECT MANAGEMENT

  • Ju-Yeoun Han;Dong-Woo Shin ;Kyung-Rai Kim ;Sang-yoon Chin;Hee-Sung Cha
    • 국제학술발표논문집
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    • The 1th International Conference on Construction Engineering and Project Management
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    • pp.1100-1105
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    • 2005
  • To compete with large construction companies whose dominance in market share is deepening recently, the needs for improving field production system of mid-size construction companies have increased rapidly. The development of an adequate model that focuses on the organizational size and work process of the mid-size construction companies are needed to increase productivity through the informatization in the construction industry[0]. The authors of this study used case studies on the problems of the mid-size construction companies in procuring work and presented a method to solve such problems so that the managers in head office of those mid-size construction companies can effecitively deal with multiple sites[0].

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중소기업의 기술혁신 촉진을 위한 우수조달물품 지정제도 평가항목 개선방안에 관한 연구 (A Study on the Technology Evaluation Index for Superior Product Selection in the Public Procurement System : Focusing SME Technological Innovation)

  • 조대명;이세헌
    • 산업경영시스템학회지
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    • 제37권2호
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    • pp.19-26
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    • 2014
  • With the radical changes and advancements of industrial economy, it is required to secure product competitiveness through technological innovations to overcome uncertain environments and generate a driving force for sustainable growth. So the Korea government introduced the superior product selection system in 1996 and has granted such incentives as priority purchasing and contracts the products of SME whose technological capabilities have passed the screening criteria. After analyzing the ambiguity of the evaluation procurement used in designation of excellent product, this study proposed seven detailed indexes for evaluation.

대형 혁신과제 추진방법에 대한 연구 (A Study on Mega-Y Project Innovation Activities)

  • 성수경;김준석;변재현
    • 품질경영학회지
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    • 제38권4호
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    • pp.531-539
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    • 2010
  • Mega-Y project is very important for a company to gain a competitive advantage in markets or to achieve drastic change in the internal processes. It stems from the company strategy and annual management goals or key performance measures, and is proceeded by the cross-functional team. This paper presents the success factors and implementation process of the Mega-Y projects. The implementation process is presented in 5 steps, including project selection, cross-functional team building, establishment of the master plan, development and execution of sub-projects, and project completion. A case study on the cost reduction project of aircraft development is presented to help for the practitioners to deploy the implementation process introduced in this paper.