• Korean Journal of Construction Engineering and Management
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• v.22 no.2
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• pp.12-20
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• 2021

Unsafe working environments slow down working speed in that it takes a lot of time to respond in case of an accident, greatly reducing the productivity of construction work. Therefore, proper safety management that does not impede the productivity of construction works is a very important factor for successful construction project. However especially in mega project, the mutual effects of safety management and productivity are complex. Therefore, this study establishes a causal model between safety management and productivity influencing factors based on effectiveness metrics, and analyzes the effect of increased site congestion due to excessive personnel input, irregular safety measures and inefficient change of work schedules. The result of this study, is expected to contribute to enhancing the competitiveness of the construction industry as the basis for establishing a safety management plan that can secure appropriate productivity.

• The Journal of the Korea Contents Association
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• v.21 no.8
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• pp.356-366
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• 2021

The high-tech industry, a leader in the national economy, has a larger investment cost compared to general buildings, a shorter construction period, and requires continuous investment. Therefore, accurate construction cost prediction and quick decision-making are important factors for efficient cost and process management. Overseas, the construction information classification system has been standardized since 1980 and has been continuously developed, improving construction productivity by systematically collecting and utilizing project life cycle information. At domestic construction sites, attempts have been made to standardize the classification system of construction information, but it is difficult to achieve continuous standardization and systematization due to the absence of a standardization body and differences in cost and process management methods for each construction company. Particular, in the case of the high-tech industry, the standardization and systematization level of the construction information classification system for high-tech facility construction is very low due to problems such as large scale, numerous types of work, complex construction and security. Therefore, the purpose of this study is to construct a construction information classification system suitable for high-tech facility construction through collection, classification, and analysis of related project data constructed in Korea. Based on the WBS (Work Breakdown Structure) and CBS (Cost Breakdown Structure) classified and analyzed through this study, a code system through hierarchical classification was proposed, and the cost model of buildings by linking WBS and CBS was three-dimensionalized and the utilized method was presented. Through this, an information classification system based on inter-relationships can be developed beyond the one-way tree structure, which is a general construction information classification system, and effects such as shortening of construction period and cost reduction will be maximized.

• Korean Journal of Construction Engineering and Management
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• v.15 no.6
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• pp.26-34
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• 2014

Highway construction is a combination of linear, repetitive, and highly equipment intensive operations. Various types of construction equipment are deployed to ensure undisrupted performance of construction, and thus productivity improvement and cost-saving can be achieved through well-thought-out planning. The selection of construction equipment is dependent upon construction sequence, site conditions, and construction methods. In the process of planning, management should consider various types of construction methods per each type of construction operation. Also, management should map out proper construction equipment operation plan that takes the construction duration and cost measures into consideration. However, limited availability of historic data from the similar types of operations has been a stumbling block to proper construction planning, making the operations performed based upon experience and intuition guided by rules-of-thumb. As a consequence, the planing phase rarely provided an adequate validity in the implementation phase. The researchers developed a process logic for each construction type that management can utilize from early phase of highway construction planning process. Moreover, derived the construction equipment combination optimized for efficiency by using the process simulation technique. The developed method is expected to be useful for the decision-making process that aims to evaluate efficiency of various process plans and to ensure optimal selection of construction equipment for highway construction projects.

• 월간 기계설비
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• s.43
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• pp.76-82
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• 1994

본 논문에서는 도시공해 방지를 위해 도시가스를 사용하는 경우 거주자의 생활 수준이나 단지의 밀도 및 난방부하 설정 등에 다소 차이는 있으나 소규모 고층아파트(공동주택)의 난방방식중 중앙난방 방식과 개별난방 방식의 초기 시설비, 연료비, 시설 관리비의 경제성을 검토하고 난방 시스템의 지침을 제시하였다. 전체 공사비(초기투자비)는 개별난방 방식이 중앙난방 방식 보다 약2$\%$정도 절감 되었다. 난방비와 시설관리에 따른 인건비 면에서도 난방의 경우 개별난방 방식이 중앙 난방방식에 비하여 난방과 하절기 운수만을 별도로 사용하는 경우 개별난방방식이 중앙난방방식보다 난방비가 9$\%$정도 더 들었으며, 시설관리 인건비 면에서는 중앙 난방 방식보다 개별난방 방식이 66.7$\%$ 적게 들었다. 전체적으로 중앙난방 방식보다 개별난방 방식이 초기투자비 및 유지관리 면에서 경제성이 우수함이 확인되었다. 본지에서는 삼익건설 기획관리부 홍도유 과장이 $\ulcorner$공동주택에 있어서 중앙식과 개별식 가스난방의 경제적 특성에 관한 연구$\lrcorner$ 자료를 지난 1월호엔 지면관계로 게재하지 못했음을 알려 드린다.

• 월간 기계설비
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• s.44
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• pp.90-101
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• 1994

본 논문에서는 도시공해 방지를 위해 도시가스를 사용하는 경우 거주자의 생활 수준이나 단지의 밀도 및 난방부하 설정 등에 다소 차이는 있으나 소규모 고층아파트(공동주택)의 난방방식중 중앙난방 방식과 개별난방 방식의 초기 시설비, 연료비, 시설 관리비의 경제성을 검토하고 난방 시스템의 지침을 제시하였다. 전체 공사비(초기투자비)는 개별난방 방식이 중앙난방 방식 보다 약2$\%$정도 절감 되었다. 난방비와 시설관리에 따른 인건비 면에서도 난방의 경우 개별난방 방식이 중앙 난방방식에 비하여 난방과 하절기 운수만을 별도로 사용하는 경우 개별난방방식이 중앙난방방식보다 난방비가 9$\%$정도 더 들었으며, 시설관리 인건비 면에서는 중앙 난방 방식보다 개별난방 방식이 66.7$\%$ 적게 들었다. 전체적으로 중앙난방 방식보다 개별난방 방식이 초기투자비 및 유지관리 면에서 경제성이 우수함이 확인되었다. 본지에서는 삼익건설 기획관리부 홍도유 과장이 $\ulcorner$공동주택에 있어서 중앙식과 개별식 가스난방의 경제적 특성에 관한 연구$\lrcorner$ 자료를 이번 3월호를 끝으로 게재한다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.899-904
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• 2007

Process management techniques are highly important in the construction industry. However, indicators or details of assessment which will show process management and its performance are still very insufficient. In particular, it is true that local corporations or small and medium sized companies suffer more difficulties than ones in metropolitan areas. Therefore, it is necessary to prepare a flexible process management and performance assessment system suited to field situations. This study identified problems of local small and medium sized companies, implemented a process and performance management system using the Lean concept, and systemized a web-based system. Also, the study proposed operational strategies so that small and medium construction companies may access and use the system easily. This will ensure the competitiveness of local small and medium sized companies, will pursue visible outcomes such as construction period reduction and construction cost reduction, and will be utilized as data related to performance assessment both during construction progress and after construction.

• Korean Journal of Construction Engineering and Management
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• v.11 no.2
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• pp.45-53
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• 2010

When increasing quantity of construction wastes, how to deal with construction wastes and environmental problems relating to disposal of construction wastes are discussed as social issues, treatment of construction waste and subsidiary issues are raised as important problems. The demolition work produce construction wastes most in construction industry. Various researches on eco-friendly treatment of construction wastes, recycling rates and recycled materials were conducted aspect of sustainability in developed countries, however, domestic remodeling projects were performed demolition work with first-demolition and second-classification method which emphasize productivity focused on efficiency. It caused not only environmental problems, but also economical problems such as increasing disposal cost of construction wastes. Solving these problems, the previous study, suggested the process model of eco-friendly demolition work to recycle materials. This paper applied eco-friendly remodeling process to practical projects and economic feasibility on eco-friendly remodeling process. Moreover these results expect to contribute the revitalization of eco-friendly demolition work in remodeling projects.

• Korean Journal of Construction Engineering and Management
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• v.9 no.3
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• pp.108-117
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• 2008

The appearance of the large distribution facility of large enterprise putting first reaches get to the various effect until change of leisure life and life pattern of the consumers from the distribution industry of the interior of a country. Competition of the distribution facility upgrade of the distribution facility and it shows the aspect which becomes the semi-department store, and construction cost is appearing different in proportion to each form or scale. Therefore, purpose of this study was to facilitate amicable construction progress between the owner and the builder through estimating the proper construction cost. This study investigated and analyzed the actual cost of 15 domestic distribution facilities and these datums were used to estimate the proper construction cost. This cost shows that from new project accomplishment through analysis of prediction construction cost for feasibility study from initial plan and design step and can be utilizable elementary data bH decision method to whether or not to propriety of distribution facilities business.

• Korean Journal of Construction Engineering and Management
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• v.22 no.5
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• pp.55-65
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• 2021

Compared with other industries, construction industry shows a higher rate of death accidents and recently companies' legal responsibilities are to be increasingly enforced. The trend causes tremendous concerns for construction firms and increases the importance of forecasting and pro-actively managing death accidents in construction fields. The objective of the study is to develop a predictive analytics model for forecasting death accidents in building projects based on a decision tree technique, which enables to forecast the probabilities of death accidents by trade. The use of the model helps to decrease risks of legal punishments and to assist the safe execution of building projects by forecasting and pro-actively managing death accidents.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.290-295
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• 2004

Along with social changes, school buildings are getting complex and diversified unlike the past. However, objective data analysis on construction costs fall short. In particular, ordering agencies are in a great need of objective and practical construction cost management for on-budget construction and procurement of quality goods. This paper analyzes the design diagram for a newly built school with an order from the Daejeon Metropolitan Office of Education, and compares the analysis with those of other kinds of buildings. The results are: the total construction cost of one school unit is 8,017,596,000 won on average; the cost is in the order of building, machinery and equipment, electricity, communications and civil engineering; as to activity, RC construction takes account of $30.3\%$ of the total construction cost. 1'he cost of school construction per M2 is 838,000 won, which is 6th highest of 11 kinds of constructions and slightly lower than 950,000 won, the average price of comparative constructions. When it comes to the percentage, school building takes mote percentage of the total cost than comparative building while machinery and equipment, electricity and communications takes slightly less percentage. Through simple regression analysis of gross coverage, this paper suggests a model formula with which the total construction cost, construction cost in accordance with activity, how much main construction materials are to be used are predictable.