학술지

Construction sites are considered as complicated work environments. Various concurrent activities may overlap apropos to time and workspace, predisposing them to spatial–temporal exposure and repetitive accidents. Detecting the characteristics of repetitive accidents before the construction stage contributes to prevent injuries and fatalities caused by spatial—temporal conditions at construction job sites. To resolve this problem, this study proposes a novel hazard identification approach through spatial–temporal exposure analysis called HISTEA, which integrated scenario analysis of accident cases into 4D building information modeling (BIM). The proposed approach consists of three modules: (1) spatial–temporal hazard investigation (SHI) to analyze the accident cases and develop…

The construction site is prone to a considerable number of accidents due to its dense and complex nature. Accidents due to falling from opening at the construction site are leading reasons for severe injuries and sometimes fatalities. Openings and Holes are made on floors and roofs during the building construction or destruction. Despite being aware of the hazards associated with openings, gaps, and holes when working at heights, many workers fail to cover the openings or remove the covers for ease of work. The current inspection procedure relies on manual practices that are error-prone, time-consuming, expensive, and difficult for a…

As construction projects resume worldwide and workers return to the job site, the possibility of transmitting the Covid-19 could be added to the extensive list of risks confronting workers in the construction sites; thus, the workers need to work alone in an assigned activity. Many workers are already working alone in the construction sites, such as utility workers, repair technicians, teleworkers, operators, and drivers. Lone workers in construction are subjected to greater safety risks compared with those working alongside others. Considering the accidents faced by lone workers, it s less likely that another person would be there to aid them-and…

Construction sites are considered as complicated work environments. Various concurrent activities may overlap apropos to time and workspace, predisposing them to spatial–temporal exposure and repetitive accidents. Detecting the characteristics of repetitive accidents before the construction stage contributes to prevent injuries and fatalities caused by spatial—temporal conditions at construction job sites. To resolve this problem, this study proposes a novel hazard identification approach through spatial–temporal exposure analysis called HISTEA, which integrated scenario analysis of accident cases into 4D building information modeling (BIM). The proposed approach consists of three modules: (1) spatial–temporal hazard investigation (SHI) to analyze the accident cases and develop…

Identifying hazardous zones is one of the priorities and duties of construction safety monitoring. With the emergence of vision intelligence technology, hazardous zones detected by AI algorithms can support safety managers in predicting potential hazards as well as making decisions. However, the risky area in images/videos continues to suffer from numerous issues as undetected or low accuracy. Further, there are many kinds of hazardous zones that need to be trained for computer vision. This study aims to develop a BIM integrated application of hazardous zone registration for the construction stage, which is represented as construction objects using image stitching. The…

Despite recent developments in monitoring and visualizing construction progress, the data exchange between construction jobsite and office lacks automation and real-time recording. To address this issue, a near real-time construction work inspection system called iVR is proposed; this system integrates 3D scanning, extended reality, and visual programming to visualize interactive onsite inspection for indoor activities and provide numeric data. iVR comprises five modules: iVR-location finder (finding laser scanner located in the construction site) iVR-scan (capture point cloud data of jobsite indoor activity), iVR-prepare (processes and convert 3D scan data into a 3D model), iVR-inspect (conduct immersive visual reality inspection in…

The recognition of the risk hazards is a vital step to effectively prevent accidents on a construction site. The advanced development in computer vision systems and the availability of the large visual database related to construction site made it possible to take quick action in the event of human error and disaster situations that may occur during management supervision. Therefore, it is necessary to analyze the risk factors that need to be managed at the construction site and review appropriate and effective technical methods for each risk factor. This research focuses on analyzing Occupational Safety and Health Agency (OSHA) related…

Many construction workers are getting injured or killed in fires and explosion accidents each year. The workers are prone to severe fatal accidents due to unavailability of permanent firefighting system in many construction sites, thus they typically rely on portable firefighting equipment (PFE) to minimize fire damage. Many occupational health and safety agencies have developed safety regulations for PFE installation and monitoring in construction. However, in the traditional construction fire safety management process, the installation spots for PFE’s are visually identified in a 2D floor plan and then top-down supervisory approach is used to inspect the active availability of the…

Construction progress monitoring and visualization have recently undergone advanced development. However, the data exchange process between construction offices and jobsites still lacks automation and real-time data records. Furthermore, an information gap between construction offices and jobsite activity persists, and progress inspectors still need to visit jobsites to check progress and assign quality ratings. Therefore, this research proposes a near real-time construction progress monitoring system called (iVR), which integrates 3D scanning, extended reality, and visual programming to visualize interactive onsite inspection and provide numeric data. The iVR system contains four modules: 1) recording jobsite activity through 3D scan (iVR-scan); 2) processing…

Construction jobsites remain among the most dangerous workplaces, with fatalities, accidents and injuries still plaguing the industry. Safety education is critical in fostering graduates capable of ensuring safe construction work; however, current learner assessment methods in pedagogy fail to ascertain the possession of safety knowledge and skills as they would be required in practice. This article aims to address this problem by proposing context-based learner assessment in construction safety education. A novel assessment system is developed and deployed with final-year construction management students, with learner testing through visualization-enhanced safety theory questions, site inspection scenario questions and job safety analysis review…

Due to dynamic and constantly changing nature of construction projects, the highest accident and fatality rate makes the industry infamous in mitigating hazardous safety risks and protecting workers at jobsites. Despite of enormous efforts and serious attention by government agencies and professional bodies, current safety management still relies on traditional manual approach by auditing and supervising safety rule compliance which are infrequent, inefficient and prone to error. With the advent of new emerging technologies such as BIM, VR/AR, AI, computer vision, and big data analytics, various tech-based solutions to help manage and reduce site risks has been introduced during the…

Fires pose an enormous threat to human safety and many spectacular fires in under-construction buildings were reported over the past few years. Many construction sites only rely on fire extinguishers, as under-construction buildings do not contain a permanent fire protection system. Traditional safety planning lacks a justified approach for the firefighting equipment installation planning in the construction job site. Even though many government agencies made safety regulations for firefighting equipment installations, it is still a challenge to translate and execute these rules at the job site. Currently, the construction industry is devoted to discovering all the possible applications of Building…

Construction safety has been a major area for research for an extensive time as the number of accidents, injuries and deaths has not significantly declined, despite strong implementation of safety laws and major efforts of the construction safety professionals. According to the Ministry of Employment and Labor, Korea (MOEL)[1] from 2012 to 2015 the Construction sector occupied the highest percentage of fatalities among all sectors in Korea. Automation of the inspection process of Temporary Safety Structures on Construction sites (TSSC) can reduce fatalities and injuries on work site. This research proposes a unique approach for the safety inspection of TSSC…

With the recent rapid advancement of vision technologies, recognized research widely applies to resolve the construction industry’s remaining problem as known quality, cost, time, and safety. However, there are few studies on how to place visual devices for effectively collecting images/videos on construction activities. This study proposes a framework for camera planning using 4D BIM and visual programming language (VPL) that considers construction’s nature. A case study was also implemented, whose results reveal the proposed method’s enormous potential in camera positioning, simulation, and schedule installation.

Falls are the leading cause of construction site accidents and made up more than 60 percent of all construction-related deaths in 2018, according to the Korea Occupational Health and Safety Administration (KOSHA). Accordingly, the government conducts intensive management and supervision of scaffolding and scaffolding installation at small sites while inducing safe working environments through support for system scaffolding installation. However, the timing of scaffolding installation for external work varies by site, and visiting inspections of more than 400,000 sites annually are practically limited. In particular, in the case of small sites, the work is often carried out with a high…

Remicon, an important material constituting the structure of a building, needs an efficient quality management system throughout the entire process from production to delivery, including production management, shipment-transport management, and delivery management, to ensure the required performance by the contractor. Nowadays Remicon factories becoming smart factories and automated form for systematic and accurate management throughout the entire process from production to delivery, including product management, manufacturing facility management, transportation management and quality management based on advanced IT technology and computerization. However, data generated from sensor technology, big data processing technology, and SCM system, which are currently applied to the Remicon…

Construction progress monitoring and visualization have recently undergone advanced development. However, the data exchange process between construction offices and jobsites still lacks automation and real-time data records. Furthermore, an information gap between construction offices and jobsite activity persists, and progress inspectors still need to visit jobsites to check progress and assign quality ratings. Therefore, this research proposes a near real-time construction progress monitoring system called (iVR), which integrates 3D scanning, extended reality, and visual programming to visualize interactive onsite inspection and provide numeric data. The iVR system contains four modules: 1) recording jobsite activity through 3D scan (iVR-scan); 2) processing…

In order to ensure the safety of construction workers during the construction process, supervision of violations of safety regulations and control of hazardous situations not recognized by the workers are continuously required. However, due to the dynamic nature of the construction site, the hazardous situation is always changing and there is a limit to managing all these risk situations in a manual manner by the supervisor. To address these limitations, various computer vision-based researches are being conducted that can automatically identify and manage risk factors. The aim of this study is to propose a system for detecting potential horizontal and…

Poor quality in construction could lead to the cash flow disruption, project delays, profit loss in projects due to rework, and some time to the property damage or human loss due to accidents. In order to ensure the quality of work, quality control (QC) departments inspect the construction work compliance with best practices, defined procedures, and specifications. These inspections rely on manual procedures, post-construction evaluation, document-based, and are carried out through a supervisory manner approach from top-down. However, this top-down control-oriented approach does not provide enough motivation for quality control managers, operators, and workers to voluntarily follow quality procedures and…

Temporary safety facilities (TSFs) are an essential support system providing necessary protection to workers during construction activities, which are targeted towards preventing the occurrence of incidents and accidents at the construction site; however, the schedule and location of installation and demolition of TSFs continue to rely on labor experience, and are often omitted from formal drawings or documents. This results in thousands of accidents in the construction industry, especially in construction small and medium-sized enterprises (SMEs) because of their several limiting factors; therefore, this study proposes automatic workspace planning for TSFs based on construction activities, which is a systematized approach…

In order to proactively prevent accidents and injuries in construction, tertiary safety education should equip students with adequate safety knowledge and skills. However, in most construction curricula, safety is considered a low priority, and safety education is delivered in isolation, without sufficient interaction and practical experience to improve safety learning. On the other hand, anatomical theory in medicine has been adopted by and proved advantageous to various scientific disciplines. With this regard, this study presents an interactive construction safety education system using building anatomy modelling (BAM) based on the integration of anatomical theory and state-of-the-art visualization technologies. The BAM system…

Soil excavation is a fundamental step of building and infrastructure development. Despite strong enforcement of construction best practices and regulations, accidents in construction industry are comparatively higher than other industries. Likewise, significant increase in injuries and fatalities are recently reported on geotechnical activities such as excavation pits and trenches. Academic researchers and industry professionals have currently devoted vital attention to acquire construction safety in preconstruction phase of the project. They have developed various algorithms to enhance safety in preconstruction phase such as automated generation of scaffolding and its potential risk analysis, checking BIM model for fall risks, and limited access…

Construction safety education plays a crucial role in improving the safety performance in the construction industry. Many research works have successfully adopted computerized three-dimensional model-based virtual reality (3D-VR) to provide students with adequate safety knowledge and skills before they enter construction sites. Despite the advantages of improving learning outcomes, 3D-VR has limitations not only in reflecting real-world visibility but also in consuming significant energy and requiring strict user–device compatibility. Therefore, this research methodology was initiated with a thorough investigation of VR application in construction safety education. On the basis of a literature review, the study subsequently analyzes the energy-consumption problems…

Despite substantial efforts to improve construction safety training, the accident rate of migrant workers is still high. One of the primary factors contributing to the inefficacy of training includes information delivery gaps during training sessions (knowledge-transfer). In addition, there is insufficient evidence that these training programmes alone are effective enough to enable migrant workers to transfer their skills to the jobsite (training-transfer). This research attempts to identify and evaluate additional interventions to improve the transfer of acquired knowledge to the workplace. For this purpose, this study presents the first known experimental effort to assess the effect of interventions on migrant…

Accidents still prevail in the construction industry, resulting in injuries and fatalities all over the world. Educational programs in construction should deliver safety knowledge and skills to students who will become responsible for ensuring safe construction work environments in the future. However, there is a gap between the competencies current pedagogical approaches target, and those required for safety in practice. This study contributes to addressing this issue in three steps. Firstly, a vision for competency-based construction safety education is conceived. Building upon this, a research scheme to achieve the vision is developed, and the first step of the scheme is…

Construction safety education plays a vital role in equipping students with concrete safety knowledge and promoting safety performance prior to entering construction sites. However, safety topics are not given adequate attention in most construction curricula and traditional pedagogic tools fail to provide practical experience or sufficiently engage students in acquiring safety knowledge. With this regard, this study proposes the VIrtual FIeld Trip System (VIFITS) for mobile construction safety education using a 360-degree panoramic virtual reality. The VIFITS utilizes a state-of-the-art 360-degree panorama-based Virtual Reality technology in order to bring construction field trips to the classroom and provide practical experience to…

Value engineering is a proven management technique for generating benefits and improving the value of construction projects. However, due to kludgy and inconvenient past data and free-thinking techniques, idea generation during VE workshop is time-consuming and often relies on VE participants’ experience. Although various studies have developed technical systems related to database management to overcome these limitations, the idea generation process is still recognized as an area to be improved. This study suggests a BIM-based VE Idea Bank to enable the systematic retrieval of past VE data, and efficient generation of new ideas. The system development includes: 1) Data model…

Construction accidents, injuries, and fatalities have not declined significantly, despite continuous efforts from researchers, safety professionals, and strongly-enforced safety laws. In managing safety, construction personnel are required to access a variety of rules, regulations, guidelines, and documents. However, finding the right contents, and communicating them to right person tends to be tedious and time-consuming, because construction safety information is not systematically structured. This study contributes to addressing this issue by introducing a system framework for integrating BIM dataset with classified regulation document. To accomplish the study objective, a general classification system is developed for safety rules using criteria that can…

Despite the consistent growth of global markets and emergence of cutting-edge technologies, construction jobsites remain among the most dangerous workplaces with extremely high accidents rates. In the safety management process, it is necessary to review and assess a variety of safety documents and data. Numerous public agencies provide open access to accident data, safety checklists, templates and other useful documents for safety management. However, these safety related contents are multifarious, fragmented and often stored in unstructured ways. As a result, the process of finding and utilizing required safety information for specific safety tasks is challenging and inefficient. In order to…

Defect data contains knowledge about specific work conditions. In order to prevent reoccurrence of defects, a data feedback mechanism is required. However, most defect data are stored in unstructured ways, resulting in the fundamental problem of data utilization. This paper proposes a novel framework by using BIM and linked data technologies for sharing defect data between heterogeneous data sources in a new way. To demonstrate, a defect ontology is developed, work context information is extracted from BIM models, extracted BIM data is converted to RDF format, and SPARQL queries are implemented. The proposed approach could help BIM software applications to…

Building construction education is crucial in ensuring university students are adequately knowledgeable and competent to meet industry demands. Attributable to the changeable and complex environment, traditional pedagogical methods in building construction courses cannot equip students with concrete experience and knowledge. Despite several studies, adapting information and communication technology (ICT) tools such as virtual reality (VR) to enhance construction education, limited interaction and low detail of virtual contents still remain an unsolved issue. To address this problem, this study proposes an interactive building anatomy modeling (IBAM) system, which allows students to conveniently interact with VR environment for experiential building construction education.…

Construction accidents, injuries, and fatalities have not declined significantly, despite arduous efforts of researchers, safety professionals, and strongly-enforced safety laws. Safety education is crucial in promoting safe and healthy construction work environments; however, current pedagogical methods and tools at the tertiary level do not sufficiently engage students or provide practical experience to support the acquisition of safety knowledge. This paper aims to address the problem by proposing a novel approach that integrates safety with construction materials and methods education. A system is proposed comprising of three sequential modules:(1) safety and hazard lecture (SHL) module;(2) hazard identification game (HIG) module; and…

In the construction process, defects occur inevitably and repeatedly, making significant contributions to cost overruns and time delays. Many studies have focused on quality education to reduce the reoccurrence of defects. So far, most of them have emphasized the necessity of teaching about defects in construction classes without considering how to take advantage of new technologies such as virtual worlds in order to improve the education process. In recent years, Virtual World (VW) has been successfully applied as a pedagogical tool in the medical field, with applications in nursing training, healthcare education, and other areas. The concept of VW is…

Safety education at the tertiary level prepares students to enter construction industry with adequate safety knowledge; then accidents can be prevented proactively. However, safety subject has not been paid adequate attention in universities and most institutional safety programs consider safety matters in isolation. Meanwhile, anatomical theory in the medicine field has been successfully adopted and proved potential advantageous in various scientific disciplines. With this regard, this study proposes a visualization based Building Anatomy Model (BAM) for construction safety education, which utilizes the anatomical theory in order to improve student’s safety knowledge and practical skill. This BAM consists of two modules:…

Safety is paramount for construction industry throughout the world. Human errors which contribute to more than half of construction accidents, could be proactively prevented through effective education and training methods. Although Virtual Reality (VR) and Augmented Reality (AR) have gained much attention in various disciplines, few studies applied them for construction safety education. This research presents a new approach in construction safety education by utilizing VR and AR. The vision of aligning teaching & learning strategies is examined in order to ensure the potential benefits of the new method. This innovative approach shifts safety education from “Listen, and I will…

The construction industry is a complex environment where high accident rates make significant contributions to cost overruns and time delays. Safety education is important in promoting a safe and healthful working environment in construction; however current pedagogical methods and tools at the tertiary level are unable to provide students with real practical and safety experiences. This study proposes an online social virtual reality (VR) system framework which allows students to perform role-playing, dialogic learning, and social interaction for construction safety and health education. The framework includes the following three modules: 1) Cooperative Distributed Safety Learning (CDSL) to understand root causes…

VE workshop is performed based on VE expert’experiences without retrieving VE data of similar previous projects. Moreover, it usually omitted or applied for the sake of formality due to insufficiently understanding VE function, limited time, space and budget. Even though many studies have established VE databases for retrieving and reusing VE data, VE workshop is still inefficient and ineffective to improve projects’ values. With this regard, this study proposes a preliminary prototype for improving VE workshop, which utilizes the state-of-the-art information communication technologies (ICTs) including Building Information Modeling (BIM), Mobile Computing (MC), Network Service System (NSS), and Database Management System…

Construction is a very complicated high risk industry involving more than twenty trades and skilled workers in various construction processes. Accidents, injuries and fatalities occur repeatedly, with incidence rates doubling the industry averages. Safety management and communication are crucial factors with immense influence on construction safety. However, due to the dynamic and complicated nature of construction work, it is often challenging to deliver safety information to the right people at the right time. This study contributes to addressing these issues by proposing a wearable computing, BIM and Augmented Reality (AR) based system to support: automated safety planning; experiential safety training;…

Due to the complex working environment, construction site still presents high accident rate, causing serious project delays and cost overruns. Safety education is important in promoting a safe and healthy working environment in construction; however current pedagogical methods and tools at the tertiary level are unable to provide students with realistic and practical safety experiences. This study proposes a framework for using mobile based Virtual Reality (VR) and Augmented Reality (AR) for experiential construction safety education. The framework consists of the following three modules: Safety Knowledge Dissemination (SKD), Safety Knowledge Reflection (SKR), and Safety Knowledge Assessment (SKA). The system prototype…

Construction is one of the largest contributors to national economies and also one of the most accident-prone industries worldwide. Construction site accidents often result in serious injuries or death, cause serious project delays and cost overruns. Prior studies focused on cause and effect relationships of construction accidents, design for construction safety, effectiveness of worker safety programs and government policies. The focus in those studies has been on generation and utilization of safety-related data and information, and not on how to share safety data efficiently among all stakeholders in the construction industry. This paper proposes a Social Network System for Sharing…

The repeated and inevitable occurrence of defects remains one of the primary causes of project schedule and cost overruns in construction. Currently, quality management on site is done by site managers through their visual senses. However, it is often challenging for a handful of site managers to perform quality management efficiently for an entire site based on inspected progress of construction works. As a consequence, inspections are often omitted, resulting in faulty construction and quality degradation which may necessitate rework. This may adversely affect project costs and schedule. This paper addresses these issues by utilizing BIM, image-matching, and augmented reality…

Construction is one of the largest contributors to national economies and also one of the most accident-prone industries worldwide. Construction site accidents often result in serious injuries or death, cause serious project delays and cost overruns. Prior studies focused on cause and effect relationships of construction accidents, design for construction safety, effectiveness of worker safety programs and government policies. The focus in those studies has been on generation and utilization of safety-related data and information, and not on how to share safety data efficiently among all stakeholders in the construction industry. This paper proposes a Social Network System for Sharing…

Construction accidents, injuries and fatalities have not declined significantly, despite arduous efforts of researchers, safety professionals and strongly enforced safety laws. Safety education is crucial in promoting safe and healthy construction work environments; however current pedagogical methods and tools at the university level are unable to provide students with hands-on practical experience. Studies have verified the strengths of virtual environments in facilitating hands-on learning in construction training and education. However, majority of these consider construction safety in isolation, whereas in reality, safety matters are intertwined with various activities, methods, machines and materials. This paper aims to address the problem by…

Construction value engineering (VE) is often performed in the form of a short term review of designs, rather than during a regular workshop with a standardized work plan, and its application method is limited. Thus, tasks are performed by applying the method in reverse depending on the VE results, and function analysis, a key VE method, is omitted or only applied for the sake of formality. In addition, it is hard to expect great results from VE because of insufficient time and budget allowed to perform VE and a lack of understanding of VE procedures and methods. In particular, the…

Radio Frequency Identification (RFID) has been applied to the construction industry for improving the efficiency of material and process management. Most RFID-related studies have focused on building or plant construction. The application of RFID has been limited in pipeline construction projects where materials are stored and stacked across a large construction site. This paper investigates practical issues in pipeline construction, improves the read rates of RFID tags, and tests their utility by putting them into practice. This paper demonstrates the benefits that may be expected with the use of improved RFID tags and the development of an automated pipeline construction…

The converted accident rates that included in Pre-Qualification (PQ) are to evaluate the results of accidents which have occurred. Therefore, it is demanded the development of proactive evaluation contents to evaluate the safety management activities and efforts on construction companies. The purpose of this study is to provide basic data for the establishment of proactive evaluation contents at public construction project in Korea through the collected and analyzed the PQ documentation applied by public agencies in Los Angeles, USA. The results indicated that diverse reactive safety evaluations are implemented to examine accidents which occurred in past projects such as occupational…

During the last two decades, designers have been embracing building information modeling (BIM) to improve the quality of the documentation that is produced as well as constructability. While BIM has become an innate feature of the design process within the construction industry, there have been limited investigations that have examined how it can be integrated into real-time communication on-site. In addressing this gap, this paper proposes a conceptual framework that integrates BIM with augmented reality (AR) so as to enable the physical context of each construction activity or task to be visualized in real-time. To be effective, it is suggested…

With recent rapid advancement of visualization technologies, recognized research work for improving construction safety management practices has been conducted for identifying safety risks as well as worker onsite training. However, most of the previous studies were limited to reflect the site safety management process, which normally consists of planning–education–inspection phases. This study proposes a framework for a novel safety management and visualization system (SMVS) that integrates building information modeling (BIM), location tracking, augmented reality (AR), and game technologies. A prototype system has been developed and tested based on an illustrative accident scenario. The potentials and technical limitations of the prototype…

In construction process, defects occur inevitably and repeatedly. It is one of the primary causes of project schedule and cost overruns. Many studies on defect causation analysis and management system have been conducted to facilitate defect measures and rectifications as well as to reduce the reoccurrence of the defect. However, those studies did not sufficiently consider the relationship of defect information flow in the construction process, which resulted in reactive rather than proactive defect management plan. This paper investigates the issues and needs of current defect management practices in the construction industry. It also presents a conceptual system framework for…

Construction accident rates are reflected in the pre-qualification of public construction projects in order to prevent accidents and facilitate the safety management of construction companies. However, the construction industry is still experiencing an increase in accident rates. Hence, there is a need to strengthen existing safety evaluation systems and requirements in public construction tendering. The objective of this study was to acquire and provide basic data for benchmarking to select tenderers in domestic public construction projects. In Singapore and Japan, safety evaluation systems and requirements are applied based on various aspects in order to screen tenderers. These evaluation systems include…

Cost estimation during early stages of construction should be swift and accurate. However, approximate estimation of the costs of bridge construction in Korea is flawed because it is calculated using average construction costs per length or area and do not reflect bridge characteristics. For quick and accurate cost estimates of the substructure of steel box girder bridges with minimum input data, this study proposes an approximate cost estimate model that is based on standard quantities of major work items. The data for 52 steel box girder bridges in Korea were collected. 42 bridges were analyzed for the model development and…

Effective monitoring of worker is one of the crucial elements in accident prevention. With advancement of sensor technologies, real-time tracking research has been conducted for improving effectiveness of monitoring in safety management. However, most of previous studies were limited to outside construction work which normally indicates excavation and heavy equipment operation. This study proposes automatic worker location tracking and risk alert system for effective risk recognition and worker monitoring that integrates smartphone and Building Information Model (BIM). A prototype system has been developed and tested based on small room. The test results show that the system has the potential to…

Construction industry is a very complicated and complex environment that causes high accident rate. The development of advanced virtual world has become an important issue for safety education in order to reduce dangerous occurrence in the construction site. However, most researchers on virtual world still have limitations such as the offline virtual world simulation, the low level of interaction between users in virtual world, and so on. With the regard to this issue, this paper proposes the adoption online 3D world Second Life (SL) platform which allows students to perform role-playing, dialogic learning, and social interaction for efficient and effective…

The purpose of this paper is to improve the current lecture-based approach of building construction education with the PBL method by utilizing construction failure information as educational material. In this paper, the failure-based e-learning (FBeL) process is proposed and tested. The difficulties in implementing PBL in building construction education are described by analyzing the characteristics of PBL. The features of failure information in terms of applicability to PBL are discussed. The FBeL process could be developed as an e-learning system and this could solve the limitation of the current lecture-based approach while building on the advantages of PBL.

Previous construction failure researches were focused on the utilization plan based on failure information and development of failure classification. However, it has limitation to set up the plan for prevention of construction failure due to the lack of the number of on-site staffs. In order to prevent effectively construction failure, a prevention plan should be established through quantitative evaluation of failure causes. The purpose of this study is to suggest the assessment method for selection Critical Management Factor (CMF) and to analyze the CMF on the apartment structural framework using FMEA (Failure Mode and Effective Analysis) which is one of…

In this paper, we propose a construction defect management system using augmented reality (AR) technology that augments virtual objects to input images in real time using a single camera. The proposed method checks construction error using an AR technique that extracts feature points using a marker from three-dimensional scenes projected as images and tracks them to estimate the camera position information. We discovered that this method enables efficient defect management on construction sites.

Recent demands from construction industry have emphasized the capability for graduates to have improved skills both technical and non-technical such as problem solving, interpersonal communication. To satisfy these demands, problem-based learning that is an instructional method characterized by the use of real world problem has been adopted and has proven its effectiveness various disciplines. However, in spite of the importance of field senses and dealing with real problem, construction engineering education has generally focused on traditional lecture-oriented course. In order to improve limitations of current construction education and to satisfy recent demands from construction industry, this paper proposes a new…

The dynamic nature of the construction industry, rapidly changing global market environments, and lowest cost competitive bidding make it difficult to survive in global construction markets. To understand global construction markets and find success factors regarding a firm’s growth, this study was conducted to develop basic data related to establishing future business strategies for Korean firms by analyzing their current business strategies as well as other advanced firms in the global construction market. To select construction companies for a case analysis, construction firms listed in the” Top 225 Global Contractors” from Engineering News-Record from 1995 to 2007 were reviewed. The…

Recently there has been a trend of hiring more foreign labors in the Korean construction sites after the introduction of the government policy for foreign workers since 2007, called Employment Permit System (EPS). With the trend in the sites, the skilled and unskilled foreign workers would have become a main resource in the construction site workforce. This study aims to analyzing the effectiveness and the reality of working status for the foreign workforce. In doing so, both mail questionnaire survey and face to face interview with site managers and foreign labors in 38 apartment construction sites around Seoul region have…

Becoming construction projects larger and more complicated, and utilizing more varied and complex contracting and delivery systems in the industry, integrating information and managing constructability from project inception to completion became the most critical tasks for the successful project management. However, current industry practices of constructability analysis which are too much dependent on field engineers and managers’ experiences, are not performed efficiently and also not managed effectively. Then the scope, method, and procedure in performing analysis tasks are not certain as well as not systematic, In addition, due to using 2D based drawings and documents, information required at project phases…

In order to encourage construction practitioners to acknowledge failures and disseminate the information, the failure information must be documented and accumulated with a well-structured format, which contains not only the fact and result but also the circumstance and cause of the failure. In the Korean construction industry, many failures are not explained clearly and often not even reported publicly, partly because due to the lack of understanding positive aspects of failures, which can improve construction practices as a result of learning from failures. The purpose of this study is to develop a web-based construction failure information system using the case-based…

The purpose of this paper is to propose a methodology that evaluates safety management information systems (SMIS) for general contractors mainly in terms of managerial effectiveness. Characteristics and variables of safety management assessments were investigated first, and several assessment techniques were then developed. A single index system measuring safety management performance of projects is also proposed for practical application. The assessments of safety management tasks are performed by several different variables including measures, project lifecycle, organization, etc. The assessment result from a case-company shows that a limited number of safety tasks can effectively represent the overall safety performance of a…

In the case of domestic, related information of expenses in order to draw up cost model at the early stage haven’t been stored systematically; moreover, similar projects which were accomplished in the past time have lacked data about actual results connected itself. Accordingly, a reliable object hasn’t been selected because validity of cost comparing a main function is difficult to dearly decide. Consequently, This study Cost model who can procures and shares and utilizes, studies that is achieved past Cost information of similarity project and achieves in phase zero for target choice of VE activity to systematic and efficient analysis…

With the electricity industry structure reformation of the government in April, 2001, Korea Power Electric Corporation was divided in to Korea water power nuclear power and 5 thermal power plant. After, various delivery method is introduced and applied for active profit creation according to the competition between each development companies for the public company privatization. However, the current situation does not satisfy the project participant by selecting the delivery method without reflecting the business goal and project characteristics of power plant construction business. The objective of this study is to research the influencing factors that should be considered to select…

In order to improve the performance of succeeding superstore construction projects, it is essential to find out an effective way for applying the opportunities of improvement on their repetitive construction process based upon the analysis of various success or failure cases occurred on previous similar projects. This research study suggests a way to improve their construction process through the applications of six sigma techniques on superstore construction projects. A literature review was implemented on the basic concept of six sigma and its general performance steps, and the step by step applications of six sigma techniques were accomplished regarding to the…

It has been recognized that safety management is activated during the construction phase to prevent accidents and fatalities of workers. However, It is revealed that about 15% of fatal death accidents is caused by the lack of management of planning and design phases. There is a crucial need of assessing safety risk during building design phase. This paper is aimed to develop a safety risk assessment checklist that can be used during building design phase, utilizing the concept of Design for Safety. In doing so, a broad literature survey on safety management of building Process, various safety risk assessment toolboxes…

For construction projects, it is required to estimate the Environmental Management Cost (EMC) for pollution prevention, using the calculation standards prescribed in the Construction Technology Management Law (CTML). However, the EMC standards are difficult to utilize without definite site information. Therefore, it is needed a new calculation method reflecting project site information. According to the definition of EMC in the CTML, this study identifies the EMC items and classifies them into the pollution types such as air, water, noise, waste and others. With this EMC classification, the stud:] analyzes using the SPSS the EMC for the 78 new multi-housing projects,…

Activity durations retain probabilistic and stochastic natures due to diverse factors causing the delay or acceleration of activity completion. These natures make the final project duration to be a random variable. These factors are the major source of financial risk. Extending the Stochastic Project Scheduling Simulation system (SPSS) developed in previous research; this research presents a method to estimate how the final project duration behaves when activity durations change randomly. The final project cost is estimated by considering the fluctuation of indirect cost, which occurs due to the delay or acceleration of activity completion, along with direct cost assigned to…

The construction failures can be decreased by continuously improving the construction process based upon the information of construction failures. Herein, the information of construction failures can be utilized as the key factor far identifying the ineffective process and providing the improved construction process that can prevent failures. The objective of this research is to suggest a model for improving construction process continuously by using the information of construction failures. An extended review and analysis of literatures related to the construction failure are performed to investigate the definition, type, cause, and lesson teamed of failure. This research also identifies that process…

The Purpose of cost Planning at the early Phase of construction Projects is to provide the clients with the appropriate cost information during the design decision-making process. Therefore, the cost planning process is expected not only to predict projects’ cost accurately but also closely to coordinate with the design decision-making activities. This paper proposes a new cost planning method for the effective and efficient directions relating a design decision-making process. Strategies for this method are i) to utilize elemental cost breakdown system, and ii) to apply probabilistic distribution theories. Based on these strategic direction, this paper proposed a probabilistic cost…

Value Engineering (VE) Workshop executes many tasks with VE team members from various experts of construction field on the basis of VE Job Plan for a short period of time. However, the VE team members are not useful with using VE information until now because it is not systematic in the accumulation and application of VE information. Especially, these problems constitute the obstacles to communication, reliability and quickness of VE information. It also causes an increase of time and cost at VE Workshop. Therefore, the results of this study suggests the conceptual model of Web-Based Information System for VE (WISE)…

The objective of this study is to develope reasonably accurate prediction models to assess hoisting times of tower cranes in the high-rise building construction. The efficient use of the tower crane is critical to achieving the Planned floor cycle time. This research describes the derivation of mathematical models to predict the hoisting times in using a tower crane. 28 factors such as nature of load, characteristics of tower cranes, hoisting movements, operation of cranes, weather conditions and so on is considered to influence hoisting times. In order to develop the predicting hoisting times Correctly, it is divided hoisting upward and…

Under the current competitive business environment, the complexity of procurement method, and the lack of engineering capacity in the construction engineering industry, a construction engineering firms require the business strategy and its performance measurement system. This study suggests a performance measurement model that could follow’H’construction engineering firm’s vision and strategy. The model utilizes the concept of Balanced Scorecard. The study proposes the four main performance perspectives such as financial, growth, internal efficiency, and improvement & learning through the long-term strategy analysis, SWOT analysis, and interviews of the employees. Also the study develops the critical success factor and the key performance…

Recently, there are growing concerns on the introduction of private financing in railroad station construction project. But private-funded station project does not have the efficient delivery system. This study is focused on the recommended solutions about the private-funded station project management. Through the literature survey and interview, it is investigated and analyzed that project management has the problems. The problems are classified as 2 areas: law & regulations and job practice. The problems in law & regulations are a lowing on the profitability, and an unreasonable project team selection process. Job practice has problems such as delaying in authorization process,…

The procedure of present military facility remodeling has many problems at the stage of evaluating the priorities in various remodeling projects which have been caused from lots of corps. These problems have usually happened not only because of the shortage of the cooperation system in the related divisions but also because of the nonexistence of the effective process and method for evaluating the priorities. I’ve reviewed the study of remodeling and military facility business and applied the AHP (Analytic Hierarchy Process) method which is effective to evaluate the priorities in various groups’ decision.

Although Construction Failure Information has been reported in literatures, reports of research, and etc., it Is difficult to utilize the information because the information classification does not exist. Therefore, this study investigated and analyzed literatures of domestic and abroad research Institutions and suggested the Construction Failure Information Classification (CFIC). The CFIC is composed of four classified items; facility general information, failure situation information, failure cause Information, and failure counterplan information. Each item is divided sub-items. Through CFIC, Construction Failure Information can be standardized and utilized for useful data to prevent recurrences of construction failure.

After the removal of SA (Selective Availability), horizontal accuracy of 25m (2dRMS) is easily obtained using GPS (Global Positioning System). In this paper, the error characteristics without SA are analyzed and a navigation algorithm concerns this error characteristics is proposed to further improve the accuracy. The proposed method utilizes the relationship between elevation angle and errors that are remained after ionospheric and troposheric delay compensation. The relationship is derived from real measurements and used as a weighting matrix of weighted least squares estimator. Furthermore, a RAIM (Receiver Autonomous Integrity Monitoring) technique is included to remove abnormal measurements affected by multi-path…

VE (Value Engineering) process and techniques are the systematic managerial tool for value engineers to help conduct VE study effectively. However, There is some difference between VE theory and practice in the domestic construction industry. Specially, function analysis appeared to be poorly recognized and regarded even as unnecessary in construction VE. It is needed to identify and enhance the problem areas to upgrade the VE practice. In order to investigate the current VE practice, a comprehensive literature survey and analysis were performed to obtain the trends and problems, related to the process and techniques. In the VE application of the…

The M&R (Maintenance & Repair) budgeting system for domestic military facilities based incremental budgeting model has caused many problems due to the difference between M&R requirement and budget, so military facility become early deterioration. this study proposes the application method of foreign M&R budgeting model for domestic military facility to improve current M&R budgeting system. In order to investigate the current status and problem of M&R budgeting system, this study reviewed various literature related characteristics and types of the foreign M&R budgeting model. The interview was performed for domestic military facility official. The model would greatly improve the current M&R…

This study proposes FREES (Fuzzy Risk Evaluation Expert System) for analyzing and evaluating risks occurring during the construction process. The feasibility of this system model was tested by virtual scenario. For the development of the model, at first, risk breakdown structure was established based on risks identified in the existing researches, that is quantitative and qualitative. FREES can reflect human cognition process in the risk analysis and evaluation by adopting artificial intelligence fuzzy theory, differentiating the existing quantitative analysis model. The FREES can be applied to all the project phases from planning to operation & maintenance stage.

The absence of systematic project procedures in the domestic SOC projects has caused many problems. Therefore, it has been raised the needs for the effective project management of the projects which helps the participants to have systematic procedures at each phase of the SOC projects. The purpose of this research is to build the current model of procurement management process for the airport facilities and to derive inherent problems, and the building direction of the effective procurement management is suggested for the future research. The result of this research could be used for delivering the effective SOC projects and for…

Planning and control for safety management executed by the head office is one of the most important parts for improving safety level of construction company. So this study is initiated with the purpose of suggesting an improvement strategy to perform effective and rational safety management at the head office. In order to investigate the current status of safety management of large construction firms in the Korean construction industry, the safety criteria related to the head office which are used in the Supermerit Certification System were chosen and examined by industry expert. The selected criteria are used for mail questionnaire. The…

In order to validate the proposed quantity takeoff method, a case study was performed by applying it to a real elementary school building, built in Korea with similar design conditions in 1997. The estimated quantity using the proposed method and the quantity at design completion were compared. On average, only about a plus or minus 4% difference with the quantity at the design completion was observed. Considering that the accuracy of an estimate in the preliminary design phase is, in general, plus or minus 10%, the proposed method provides an accurate estimate.