• Title/Summary/Keyword: Work delay

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An Analysis on Work Delay Factors in Apartment House Construction (공동주택 공사의 작업지연요소 분석)

  • Ahn, Sang-Hyun;Yu, Jung-Ho;Kim, Chang-Duk
    • Korean Journal of Construction Engineering and Management
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    • v.8 no.6
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    • pp.159-166
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    • 2007
  • Work delay is one of the facts that make the reliability of construction projects decrease. Therefore, it is important to classify and prioritize the delay factors. This research analyzed key delay factors in apartment house construction through survey. The results of analysis are as follows. (1) Insufficient work force is the key delay factor in structural and finish work. (2) Improper craft of worker is the key delay factor in electrical work. (3) Incompletion of proceeding work is the key delay factor in mechanical work.

Delay Factors Based on the Importance of Finish Work in Apartment Construction Project (공동주택 마감공사 중요도 기반 작업지연 요인 분석)

  • Lee, Seung-Hoon;Lee, Sang-Hyo;Kim, Ju-Hyung;Kim, Jae-Jun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2010.05a
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    • pp.125-129
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    • 2010
  • The ultimate goal of construction is to complete the given work in the most economical and safest way within the required construction period while meeting the quality standards specified in the design drawing. There are a few characteristics of finish work. First, executed in subdivided processes, finish work involves a very diverse and complex structure. Second, there are no criteria for each segmented process with regard to the appropriate time of input. Third, it is not very necessary to set priorities for lead and lag works. This study intends to provide information on the completion of a project in accordance with the required duration by setting priorities in the delay of each detailed process of finish work to minimize delay in finish work. In this study, finish work is divided into wet work and other types of finish work, and the importance of each process is classified based on the given details of each process. In addition, the study employs a survey to analyze delay factors of a designer, a constructor, and a supplier. Using the survey results, the study sets priorities in delay of final work to provide information on the completion of an apartment project within the planned construction period.

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Impact Analysis of Construction Delay: The Case of Defects In the Top-down Construction Method

  • Suk, Janghwan;Kwon, Woobin;Soe, Jang-woo;Cho, Hunhee
    • International conference on construction engineering and project management
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    • 2022.06a
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    • pp.213-221
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    • 2022
  • Defects are the risk factors in the construction process of buildings. They cause damage, delaying the construction duration. They especially cause adverse effects on the top-down construction method. This study analyzed the degree of construction delay induced by each work type, focusing on defects in the top-down method. Then, we derived construction delay induction coefficient from different work types in order by using the severity of construction delay per defect and the occurrence probability of defect; this assessment model measures the impact of defects on construction delay for each work type. Furthermore, by comparing each work type based on the defect frequency and the construction delay induction coefficient, we found work types that need to be administered attentively. We identified that plastering work was easy to overlook, requiring caution in defect management. This study provides an efficient defect management system suitable for the buildings that are built using the top-down construction method.

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An Analysis on Work Delaying Factors in Apartment Building Construction (공동주택 공사의 작업지연요소 분석)

  • Ahn, Sang-Hyun;Yu, Jung-Ho;Kim, Chang-Duk
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2006.11a
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    • pp.496-501
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    • 2006
  • Work delay is the one of facts that make the reliability of construction business decrease. Building a causal classification system of work delay and deducing the managemental item for it gives a great competition to the construction industry. It is, however, so rare to study about work delay so far. Therefore, this research analyzed a questionnaire, which is focussing on the public apartment construction, to look into the causal root factors and deduce the work delay factors. Finally, we suggest a major managing point to remove effectively the work delay factors.

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A Study on the Work Delay Factors of Reinforced Concrete Work in Apartment House Construction (공동주택 철근콘크리트 공사 작업지연요인에 관한 연구)

  • Lee, Hyun-Chul;Lim, So-Yean;Yeo, Sang-Ku;Go, Seong-Seok
    • Journal of the Korea Institute of Building Construction
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    • v.9 no.2
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    • pp.55-61
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    • 2009
  • In order to conduct construction projects effectively, the work delay factors would be managed by planned construction schedules. As construction works are delayed ceaselessly, the solution is to select and manage the key factors which delay the work ceaselessly. The subjects of this study were an apartment houses of reinforced concrete structure. Hidden work delay factor were extracted, the surveys were conducted and occurrence, severity and detection of each factor were analyzed. With this result, final orders of priority were fixed and key management factors were deducted and presented.

MATHEMATICAL MODELLING FOR THE AXIALLY MOVING MEMBRANE WITH INTERNAL TIME DELAY

  • Kim, Daewook
    • East Asian mathematical journal
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    • v.37 no.1
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    • pp.141-147
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    • 2021
  • In [1], we studied the PDE system with time-varing delay. Time delay occurs due to loosening in a high-speed moving axially directed membrane (string, belt, or plate) at production. Our purpose in this work derives a mathematical model with internal time delay. First, we consider the physical phenomenon of axially moving membrane with respect to kinetic energy, potential energy and work done. By the energy conservation law in physics, we get the second order nonlinear PDE system with internal time delay.

Work Measurement through Application of Work Sampling in Hospital Dietary Departments Classified by the Productivity Level (급식생산성 유형별 병원 영양과의 워크샘플링 (Work Sampling)을 적용한 작업분석)

  • 양일선
    • Journal of Nutrition and Health
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    • v.26 no.4
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    • pp.443-454
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    • 1993
  • The purposes of this study were to analyze the work patterns of selected hospital foodservices by Work Sampling methodology, and to investigate the relationship among operational factors affecting productivity. The hospitals were classified into 3 groups by the percentage of patient meals, and the percentage of special patient diet, and the menu items of patients meals. The groups clustered were characterized by productivity. Work Sampling methodology was utilized to analyze the work patterns of hospitals with selected 3 hospitals to investigate the productivity the productivity and labor times used in each work functions. Productivity index analyzed by Work Sampling were 10.36 min/meal, 10.95 min/meal, and 12.19 min/meal, respectively X, Y, Z hospital. Z hospital was significantly different from time used in direct work function and delay. Direct work function time was the highest, delay the lowest in Z hospital. The relation between the results of Work Sampling and the productivities of 3 groups showed not by delay but direct work function in the classification used in this study.

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Analysis of Progress Schedule and Delay Element of Frame Works in Apartments (아파트 구체공사의 공정관리 및 공기지연요소 분석에 관한 연구)

  • 최은준;최민권;조형근
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2003.05a
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    • pp.157-160
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    • 2003
  • In order to reduce the construction cost and period without degrading the quality, construction companies are making a lot of efforts to prefabricate and mechanize the construction process, and introducing and utilizing various techniques of construction time management in the process of construction. However, due to the various factors (such as weather conditions, labor factors, supply of equipment and materials, safety accident, etc) in the process of construction, construction projects are not frequently completed within the scheduled Period. This research is to examine the current status of construction time management and factors causing delay in construction with regard to the concrete work (such as form work, steel reinforcement, and concrete work) in building apartments.

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A Study on the Priority Analysis of Work Delay Factors in Steal-frame Work using FMEA (FMEA를 활용한 철골공사 작업지연요인의 중요도에 관한 연구)

  • Lee, Hyun-Chul;Lee, Jae-Hong;Go, Seong-Seok
    • Korean Journal of Construction Engineering and Management
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    • v.10 no.1
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    • pp.91-101
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    • 2009
  • The factors of uncertainty such as work delay could cause many problems, for example, increase of construction cost and terms of work, and the deterioration of quality. Because of these, the uncertainty risk is regarded as an important management factor to obtain the success of construction project. So, the systematic management plan about the uncertainty factors is needed because it plays an important role in the completion of entire project. And also analysis of some factors which can cause the work delay can be one way of improving construction project's certainty and making it competitive. In this reason, we have to make an effort to set a priority based on analysis of quantitatively numerical value about work delay factors to manage them effectively. Thus, this study aims to suggest the basic data for the effective management and prevention of work delay in steel-frame work which is progressive actively now, along with increasing of demand of high-rise buildings by analyzing each reasons of work delay factors and also by suggesting important management factors that are coded according to each construction work using FMEA method which could give a data about the importance of work delay factors through quantitatively numerical value.

Delay Factor Analysis and Process Enhancement System Development Focusing on Masonry Work (조적공사에서의 작업 지연 요소 도출 및 개선 시스템 제안)

  • Park, Min Ha;Lee, Hye Lin;Ko, Yong-Ho;Han, SeungWoo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.119-120
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    • 2015
  • Appropriate management of the finish works in construction project is one of most important activities that must be conducted considering the total duration of the project. Masonry work is a fundamental process that is performed in the preliminary steps of finish works. However, it has been investigated that the analysis of delay factors affecting masonry work has been neglected in the domestic construction site. Therefore, this study deducts delay factors affecting masonry work by literature review and survey on site engineers and labors. This study has been conducted as a preliminary step of developing a construction project interference management system which is expected to suggest objective information for the decision making in construction sites.

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