• 대한건축학회논문집:구조계
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• 제35권4호
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• pp.175-184
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• 2019

To improve productivity in the architecture, construction and engineering industry, it is critical to understand both current and historic trends in construction productivity. This study analyzes and compares construction productivity trends of South Korea, the U.S., the U.K., and Japan 1995 to 2015 using the following three measures: construction labor productivity, construction duration per floor, and construction duration per 1,000 m2 floor area. As the results, the international competitiveness of each country varied according to which measures were used to analyze them. Among the four countries, the construction labor productivity of the U.S. was the highest, followed by that of South Korea. South Korea also had the second highest productivity growth rate, following that of Japan. On the other hand, when analyzed from the perspective of construction duration, the construction productivity in South Korea appeared relatively lower than those of other countries. There were differences in the location of construction competitiveness of each country analyzed by various measures. Therefore, to accurately diagnose and improve the construction competitiveness in South Korea, strategies based on various measures are need to established simultaneously.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.11-12
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• 2011

The Construction Standard Production Unit(CSPU) has been used for the standard cost estimate in public and private construction projects. However, It is difficult to reflect the various site attributed variation in productivity using existing CSPU. The reason is that a criteria which site should be selection for enactment and/or revision of CSPU is not established. This study aims to provide essential data to be used for analyzing the labor factors in a way to secure efficiency and reliability of CSPU.

• 한국건축시공학회지
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• 제8권5호
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• pp.67-73
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• 2008

Recent trends in construction towards larger scale and taller buildings are causing problems by ineffective existing management approach in construction industry have emerged. Delivering necessary materials and mobilizing the human resources and equipment In a timely manner to keep labor on schedule have become a critical issue to be addressed. In particular, many specialty contractors carrying out multiple projects have been experiencing difficulties mobilizing the manpower on time and in right places due to poor communication at each stage of labor supply, resulting in waste of valuable resources. Hence, it's imperative for the specialty contractors to obtain specific information on labor demand so as to set up a communication and labor management system to ensure the right human resources will be mobilized in the right place at the right time. The study therefore is aimed at developing an optimal human resources management system for specialty contractors performing multiple projects. To that end, the study is focused on rebar and concrete work. The outcome of the study is expected to help allocate the right human resources to the right place in a timely fashion, thereby achieving an effective workflow at construction sites.

• 한국건설관리학회논문집
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• 제15권1호
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• pp.11-19
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• 2014

건설 산업은 순공사비 중 인건비 비율이 30~40%를 차지하는 노동집약적 산업임에도 불구하고 현장 노무자는 3D직업이라는 인식으로 인해 인력 부족을 겪고 있다. 모듈러 공법은 전체 공정의 대부분을 공장에서 수행하기 때문에 노무자들이 안정된 직업이라는 인식을 갖고 종사할 수 있으며, 모듈을 운반 후 현장 설치만 하면 되기 때문에 현장에서의 공정을 최소화하여 공기를 단축할 수 있다. 현재 국내에서는 군 병영시설을 중심으로 모듈러 시장이 확대되고 있지만, 다소 비효율적인 공장 생산으로 모듈러 공법의 가장 큰 장점인 공사기간 단축의 효과가 달성되지 못하고 있다. 특히, 모듈러 공법은 타 공법에 비해 상용화되어 있지 않아 지속적인 수주가 어렵기 때문에 인력에 대한 문제가 항상 제기되고 있다. 다기능공은 두 가지 이상의 기술을 가지고 두 가지 이상의 작업을 수행할 수 있는 기능공을 말하며, 선행 작업과 후행 작업의 연계성을 파악할 수 있어 매끄럽게 일이 진행될 수 있도록 하는 역할을 한다. 따라서 본 연구는 다기능공을 모듈러 공장 생산에 적용하여 경제성을 향상시키고자 한다. 인력을 효율적으로 배치시킴으로써 작업 중 발생하는 유휴인원을 줄이고 총 투입인력을 감소시켜 인건비를 줄일 수 있다. 모듈러 원래의 장점인 짧은 공사기간과 더불어 낮은 비용을 부각시켜 모듈러 시장의 활성화를 기대할 수 있다.

• Journal of Construction Engineering and Project Management
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• 제1권1호
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• pp.37-43
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• 2011

Labor productivity is a significant factor associated with controlling time, cost, and quality. Many researchers have developed models to define methods of measuring the relationship between productivity and various parameters such as the size of working area, maximum working hours, and the crew composition. Most of the previous research has focused on estimating productivity; however, this research concentrates on estimating labor productivity and developing time and cost data for repetitive concrete pouring activity. In Korea, "Standard Estimating" only entails the average productivity data of the construction industry, and it is difficult to predict the time and cost spent on any particular project. As a result, errors occur in estimating duration and cost for individual activities or projects. To address these issues, this research sought to collect data, measure productivity, and develop time and cost data using labor productivity based on field conditions from the collected data. A probabilistic approach is also proposed to develop data. A case study is performed to validate this process using actual data collected from construction sites. It is possible that the result will be used as the EVMS baseline of cost management and schedule management.

• 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.256-261
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• 2011

Labor productivity is a significant factor related to control time, cost, and quality. Many researchers have developed models to define method of measuring the relationship between productivity and various constraints such as the size of working area, maximum working hours, and the crew composition. Most of the previous research has focused on estimating productivity; however, this research concentrates on estimating labor productivity and developing time and cost data for repetitive concrete pouring activity. In Korea, "Standard Estimating" only contains the average productivity data of the construction industry, and it is difficult to predict the time and cost of any particular project; hence, there are some errors in estimating duration and cost for individual activity and project. To address these issues, this research collects data, measures productivity, and develops time and cost data using labor productivity based on field conditions from the collected data. A probabilistic approach is also proposed to develop data. A case study is performed to validate this process using actual data collected from construction sites and it is possible that the result will be used as the EVMS baseline of cost management and schedule management.

• 한국건설관리학회논문집
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• 제6권5호
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• pp.139-147
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• 2005

During a typical construction project, a contractor nay often find that the time originally available or normally expected to perform its work has been severely reduced. To finish the project by the completion date, the contractor is forced to find a way to speed up the progress of its work to compensate for the reduction in available time. The most frequent initial reaction of contractors to this situation is to increase on-site manpower by working longer time (overtime), adding more workers (overmanning), or implementing shift work (shift work) to increase the rate of progress. The goals of this study were to investigate how these three methods affect labor productivity and to quantify their impact on labor productivity by analyzing real project data collected from sheet metal contractors and mechanical contractors in the US.

• 대한토목학회논문집
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• 제34권6호
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• pp.1893-1899
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• 2014

본 연구는 노무중심의 전문건설업체의 경영성과지표와 건설경기지표와의 상관성 분석을 통해 노무중심의 전문건설업체의 대응전략을 제시하는 것을 목적으로 수행되었다. 노무중심의 전문건설업체는 건설수주액이 유동자산회전율에 장기적으로 영향을 미치고 있다. 이는 인력확보를 위해 유동자산을 운용하고 있기 때문인 것으로 판단된다. 즉, 노무중심의 전문건설업체는 특정 자재 혹은 장비에 대한 확보가 아닌 근로자의 수급에 초점을 맞추고 있기 때문에, 원활한 인력수급을 위해 유동부채 해결을 위한 유동자산을 운영하여 매출액 증가를 도모하기 때문인 것으로 판단된다.

• 한국건축시공학회지
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• 제13권4호
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• pp.372-381
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• 2013

In the construction industry, a great deal of research has been focused on productivity improvement because a minor change in labor productivity can often make the difference between a profit and a loss. This study shows how productivity measurement methods can be applied in practice, step by step, to analyze and identify potential problems both in productivity and methods performance for masonry work. A work sampling technique was conducted to determine the nature and extent of an observable activity as an aid to measuring overall performance. Also, a method productivity delay model was used to identify non-productivity in individual cycle times. From the work sampling technique, it was found that the masonry crew had a Labor Utilization Factor of 47.1%, and from the videotape analysis, it was found that the material and dumpster location need to be adjusted to reduce the travelling distance. We have found that efforts to improve the productivity of masonry work should be focused almost exclusively on machine and labor delays, based on the result from the method productivity delay model.

• 한국건설관리학회논문집
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• 제2권2호
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• pp.81-89
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• 2001

건설산업은 생산의 단속성, 시장의 불안정성 등 다른 산업과 비교하여 독특한 특성을 갖고 있다. 이러한 특성으로 인해 건설 공사의 비용은 일반 제조업분야에 비해 실제 투입되는 생산비용을 파악하기가 어려우며 프로젝트별로 많은 차이를 나타낸다. 따라서 건설비용을 표준화하는 것은 매우 어려운 작업이며, 비용의 정확한 측정과 분석은 매우 중요한 의미를 갖는다 본 연구에서는 원가계산에 의한 예정가격 산정시 문제점인 획일적인 비율적용에 의한 기존 간접노무비율 산정기준의 문제점을 완성공사 원가구성 분석자료를 통해 고찰한다. 이상의 분석자료를 바탕으로 합리적인 건설공사 간접노무비율의 산정방법 및 기준을 제시하여 실제공사의 예정가격 작성시 의사결정을 돕고자 한다.