• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2002년도 학술대회지
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• pp.385-388
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• 2002

다수의 공사수행주체가 복잡한 생산프로세스 내에 존재하는 건설산업의 특성상 참여주체간에 발생하는 문제와 공정 간섭은 생산성 저하의 주된 원인이 된다. 이를 해결하기 위해 최근에 '다공종 통합발주방식'이 제안되었고 일부 대형업체를 중심으로 시범 운영되고 있다. 그러나 통합발주는 아직 제안 초기단계로 실질적인 시행을 위해서는 다양한 기초연구가 선행될 필요가 있다. 따라서 본 연구에서는 통합발주를 시행하여 원${\cdot}$하도급업체 모두가 효율성을 증진시킬 수 있는 작업요소를 규명하고자 한다. 이는 건설업 전반에 통합발주의 필요성을 인식시키고, 통합발주 시행 시에 다수의 공종을 통합하는 기준을 제공할 수 있을 것으로 기대된다.

• 지식경영연구
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• 제16권4호
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• pp.169-190
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• 2015

The status of small and medium-sized enterprises has been changed into more independent business entities rather than simply subcontractor so that the utilization of specialized knowledge has been much more necessary for the survival in the market. However, small and medium-sized enterprises, it is difficult to sufficient investment in knowledge services due to limited resources relative to large enterprises and demand for knowledge services business of government support is growing. For this reason, it is important to measure accurately the demand for knowledge services of small and medium-sized enterprises in knowledge management for effective utilization of knowledge service. In this study, we analyzed previous studies on small and medium-sized enterprises knowledge services that can be utilized in a comprehensive way. As a result, we developed knowledge service needs assessment model based on five critical success factors for continual growth and 12 types of knowledge service. This model has been modified and supplemented through expert meeting using delphi research method and topic modeling analysis using secondary data. This study is attempted to appropriately measure necessary knowledge services for small and medium-sized enterprises so that generated the evaluation model of knowledge service demands, comprehensively dealing with core knowledge services for many kinds of business entities. It is expected that the developed model will be a useful tool to understand and evaluate knowledge services demands of enterprises.

• 한국경영과학회지
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• 제32권1호
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• pp.93-104
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• 2007

We consider a supply chain where products are shipped to warehouse from manufacturing system to customers. Products are supplied from either in-house regular manufacturing or the secondary source such as subcontractor. The inventory in warehouse is controlled by base-stock policy, that is, whenever a demand arrives from customer, an order is released to the manufacturing system. Unsatisfied demand is backlogged. The manufacturing system is modeled as M/M/s+1/c queueing system, and the orders exceeding the given limit care blocked and lost. The steady state distribution of the outstanding orders and the throughput of the manufacturing system are functions of the level of engagement In the secondary source. There is a profit obtained from throughput and cost not only due to the engagement of the secondary source in the manufacturing system but also inventory positions. We want to maximize the total production profit minus the total cost of the production system by simultaneously determining the optimal level of engagement of the secondary source and the optimal base-stock level of the inventory. We develop two algorithms : one without guarantee of the optimal solution but with the small number of computations, the other optimal but with more computations.

• 한국안전학회지
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• 제32권2호
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• pp.78-84
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• 2017

Subcontractors have an increased risk of accidents compared to large contractors. Subcontractors' safety management system is in close association with workers in construction sites. Contractors should strengthen subcontractors' roll and responsibility and provide continual support to prevent an accident. And also these supporting system should be provided to subcontractors' headquarters as well as construction site. Contractors' priority management for subcontractors safety should be transferred from the post management for disciplinary action to the preventive management to improve subcontractors participation and safety performance. Subcontractors can not establish the safety management system with just a one time supporting only. Contractors support and monitoring should be provided to subcontractors regularly and continuously to establish their self safety management system. The subcontractors safety management system improvement program(SSMSIP) suggested in this study will be a effective supporting system for subcontractors to establish and improve their safety management system. If we carry out the objective and quantitative evaluations and supporting system such as SSMSIP and provide the consequential incentive program to subcontractors, it can contribute to the accident reduction.

• 한국건축시공학회지
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• 제10권5호
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• pp.69-74
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• 2010

건설현장에서 발생하는 재해는 산업재해보상보험으로 보상되는 것이 정상적인 방법이나 일부 재해는 발생사실을 은폐하여 건설업체나 현장에서 직접 보상하는 음성적인 방법인 ‘공상처리’를 하는 경우도 있다. 이러한 음성적인 방법은 공공 공사 입찰에 반영되는 PQ점수에서 가점을 받기위한 목적도 있으며, 향후 수주활동에 불이익을 당하지 않으려는 협력업체의 입장도 반영된 것으로 볼 수 있다. 일부는 재해율에 대한 건설업체의 약점을 알고 이를 이용하여 부당한 산재보상을 요구하는 경우도 있다고 한다. 본 연구는 건설현장의 재해가 미치는 영향과 환경을 알아보고, 이에 대한 건설공사 참여자의 인식을 조사하여 문제점 파악 및 대안 도출의 기초자료를 제공하는 것이다.

• 대한안전경영과학회지
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• 제15권2호
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• pp.143-149
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• 2013

Recently in the construction business construction companies has been ordered to survive in the terriblly competitive environment. Aa a result, most of the project with low-priced contract needs a speedy progress during all construction period. For the last five years major incident frequently occurs and results in the death of 189 workers at major top 6 construction builders. In most recent 10 years, the cause of major incidents happened in construction company is the speedy construction work that is affecting on the safety management. To prevent these accidents in the speedy construction work, four factors were chosed and analysed such as the personnel/organization, the working budget, the subcontractor selection and the employee motivation. The head office taked the support plan and tested it at the pilot work site. It showed a reduced accident and the harmful factors can be eliminated. It should be able to apply to the field to secure safety and prevent accidents.

• 한국건축시공학회지
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• 제11권4호
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• pp.396-406
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• 2011

Execution of the finish work for high-rise residential construction occurs when a mixture of work progresses simultaneously at each floor or sector and is carried on by highly-specialized subcontractor teams. Therefore, the finish work plan requires an effective scheduling method that interfaces between the work and the teams. In order to address these issues, the TACT technique is utilized in Korea. This technique is based on Line-of-Balance and Lean construction. However, according to recent case studies, finish work using TACT technique was frequently delayed with cost overruns because the work was performed without a detailed schedule control plan outlining the relationship between architecture and mechanical, electrical, and plumbing work. This paper describes the enhanced-TACT technique which provides a detailed work flow chart and TACT work template. With improved TACT technique, this paper will contribute to improved cash flow and reduced cycle time and provide quality improvement through work continuity.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2002년도 춘계공동학술대회
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• pp.363-370
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• 2002

This paper presents a production planning algorithm for minimizing the costs of production and subcontracting in SCM (supply chain management) environment. In our SCM environment, the several local plants that aye dispersed geographically produce parts and products. In this environment, we have to decide the production volumes of both parts and products considering the BOM (bill-of-material) structure to meet the fixed order quantity or forecasted demand quantity. Each plant produces the specified parts of product with finite production capacity. There exist subcontracting decisions relevant to the production capacity of each plant except the core process plant, and when we use the subcontractor's capacities we should be charged for the fixed subcontracting fees. The objective of this study is to solve the production planning problem, which minimizes the total costs of production, inventory, setup, and subcontracting under constraints of production and subcontracting capacity. For this problem, an integrated production planning model based on the multi-level capacitated lot sizing problem was formulated, and efficient decomposition algorithm was proposed. The experimental investigation shows that the proposed heuristic generates quite good solutions at very low computational costs.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.635-641
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• 2009

In the building construction, the specialist contractors play the important roles in the point of the quality securing. Therefore, it is very important for the construction industry to study the sub-package problem. The sub-package problem includes two problems which should be solved. One is to decide the scope of works of each specialist contractor, and another one is to decide the particular specialist contractor which carries out the work. However, the sub-package problem in Korea is not clarified yet, although the circumstance around it has changed rapidly. Many factors influence to the sub-package problem regardless of internal factors or external factors of the project. The general contractor usually decides the sub-package under considering the project conditions. In case of the internal factors, each general contractor manages the organization and materials. But the external factors are relatively more difficult to control and predict than internal ones. But out of the external factors, the legal system has very close relationship with a sub-package problem especially in Korean construction system. So, this paper clarifies relationship between the legal system relating subcontracting and the state of sub-package.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.566-572
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• 2009

Turn-key and CMF(CM for Fee) have been selected as procurement paths of large public projects in Korea. However, recently, researches and discussions on CMR(CM at Risk) have been popular as the Korean government seeks for alternative procurement paths to enhance the performance. In the CMR projects, the part who is responsible for construction management should predict and control the potential risks for guaranteeing benefits. In this paper, CMR projects in which a general contractor plays the role as CMr is mainly analyzed. We give attentions to risk management during construction process given that subcontractors, main parts in this phase, work in various ways and thus more chances for faults exist. In this case, for the general contractor, to recognize potential risks in previous to start construction works of subcontractor by means of virtual design and construction (VDC) must be essential to this end. The case study of practices on VDC in U.S in which CMR has been introduced can provide considerable aspects to implement it in Korea.