Augmented reality (AR) and virtual reality (VR), a kingdom-of-the-art technology for superimposing information onto the real world, have recently started to have an effect on our everyday lives. In addition, AR and VR have shown a great contribution to advanced construction management in recent years. However, a comprehensive critical review of AR and VR technologies in construction management is absent in the literature. This study provides a comprehensive review of a summary of using potential opportunities of AR and VR to solve a variety of construction management issues effectively and efficiently. This study found that AR is successfully used in construction project scheduling, progress tracking, worker training, safety management, time and cost management, and quality and defects management. VR is effectively used as a visualization tool, worker training technology, safety management tool, and quality and defects management tool. In addition, AR and VR are used for developing a network that allows the possibility of having conferences with those who are geographically far off from each other or the construction site. This study could help to explore the potential fields of using AR and VR technologies in the construction industry effectively as advance time- and cost-saving profitable tools.

Construction industry is one of the largest economic sector in the world in 2017. And Building Information Modeling (BIM) is the powerful set of technology to design, construction and management has been strengthen the construction industry. BIM has significant benefits for the project lifecycle even after it‘s lifecycle but this benefits can‘t gain by the project because of failure to successful implementation of BIM technology to the construction industry. The main objectives of this study is to identify the most crucial barrier to implementation of BIM and develop a relative rank with their relative impact on this issue. The study was conducted by a comprehensive literature review and necessary data was collected by literature review also. A set of barrier was developed by the literature review containing 37 barrier which curb the implementation of BIM technology to the construction sector. Relative rank based on their frequency and relative impact was calculate for each barrier identified in the literature review. The five most crucial barrier to the implementation of BIM are B17 (Social and habitual resistance to change), B19 (Traditional methods of contracting), B3 (Training expenses and the learning curve are too expensive), B20 (High cost of software purchasing) and B33 (Lack of awareness about BIM). And the five most impactful barrier are B19 (Traditional methods of contracting), B17 (Social and habitual resistance to change), B33 (Lack of awareness about BIM), B2 (Unavailability of proper training on BIM) and B28 (Lack of BIM experts). To gain the tremendous benefits of BIM technology, it is necessary to overcome the barrier based on priority with the help of government and all the stakeholder of project.

Purpose: Construction management is enriched in many ways by direct and indirect support of lean construction concept. The objectives of this study are to assess the current level of awareness about lean construction practice, to identify the potential benefits and challenges to implement lean construction in the Bangladeshi construction industry and to prioritize them. Design/methodology/approach: A comprehensive literature review has been done to design a questionnaire for the survey. The final questionnaire has been designed with 27 lean tools, 41 challenges, and seven benefits of implementing lean principles in the construction industry. A total of 164 valid responses have been collected from Bangladeshi construction practitioners involved in different types of construction organizations. The result has been analyzed by Relative Important Index (RII). Findings: The findings revealed 41 challenges to implement lean construction with seven benefits in the Bangladeshi construction industry. The result shows that an appreciable number of respondent familiar with the techniques of lean construction but they don't practice. The findings have also pointed out that the lean construction approach adds a positive impact especially on quality, safety, cost, productivity, and environmental level. The top-ranked challenges to implementing lean construction are: lack of awareness and skill, poor management, traditional culture and attitude of employees, inadequate resources and equipment and nonuse of modern techniques and technologies. Originality/value: This study reveals real scenario of lean construction in Bangladesh. It contributes to the body of knowledge, as it uncovers for the first time the awareness level, benefits and challenges to implement lean construction with reference to the social, economic and cultural context of Bangladesh. Exploring the findings, the study could help the stakeholders, construction firms, academician, researchers and government to focus their effort and resources on the significantly appropriate issues. Again, the study may be beneficial to developing countries especially in South Asia which share the same socio-economic status with Bangladesh.

Purpose: Construction management is ameliorated by the lean construction concept in many direct and indirect ways to reduce waste of construction process and improve the value. The purpose of this paper is to identify the challenges of the implementation of lean construction in the Bangladeshi construction industry and to prioritize these factors that constitute these challenges.Design/methodology/approach: A comprehensive literature review was used for shorting the global challenges of implementing lean construction. Subsequently, these challenges were incorporated into a structured questionnaire for survey. A total of 164 valid responses were collected from Bangladeshi construction practitioners involved in different types of construction organizations. The results were analyzed using the Relative Important Index (RII) and Mann–WhitneyUtest.Findings: The findings revealed 41 challenges of lean construction implementation in the Bangladeshi construction industry. The highest ranking challenges are the lack of awareness about lean construction, lack of skills, training and lean techniques, unwillingness to change the existing culture, lack of management commitment, fragmented and cyclic nature of the construction project and unavailing communication between all project participants. The study also discusses some universally applicable solutions to overcome these challenges.Originality/value: By the findings of this study, the Bangladeshi construction industry could get a new insight into the challenges of implementing lean construction. It could play a very important part in the body of knowledge, as it reveals the challenges of implementing lean construction for the first time with the socio-economic context of Bangladesh. Exploring the findings, the study could help the stakeholders, companies, academician, researchers and government to focus their effort and resources on the significantly appropriate issues. Furthermore, this study may beneficial to those developing countries especially in South Asia, who have shared the same socio-economic status with Bangladesh.

Construction workers are backbone of this industry since construction industry is less mechanized and more labor intensive. So the major consideration is ensuring workers safety during construction in Bangladesh. As current practice of Bangladesh checks the construction safety manually, this checking process always leads to error-prone, inconsistency in assessments and delays the construction process as a whole. The aim of this study is to develop an automated fall safety checking system using BIM to solve this problem in the Bangladeshi context. A framework is developed and safety rule checking approach is illustrated during conceptual and legal stage and how these process works in two situations is proposed to identify fall hazard at planning phase. A case study is performed to illustrate its practical implementation on a building project in Bangladesh. Results show that the developed system demonstrates the feasibility of integrating safety into BIM for detecting and eliminating fall-related hazards. This study will contribute the construction professionals by introducing and informing automated safety checking platform to find the reports, why, where, when, and what safety measures are needed for preventing fall-related accidents at pre-construction phase. The significance of this study is to lead to safer designs early in a project.

Bangladeshi construction industry suffers more safety issues than other developing countries in the world. Among many of these, accidents at the construction site go far beyond and shape a horrific figure of death every year. The aims of this study are to identify and prioritize the causes of accidents. This study also analyses and discusses causes of accident at the construction site in Bangladesh. A widespread literature review and open discussion took place to identify the causes and design the questionnaire. The questionnaire-based survey was used to elicit the attitude of four stakeholders such as workers, owners, consultants and contractors towards the causes of accident. Mean and relative importance index (RII) were used to determine the rank of causes, and Statistical Package for the Social Sciences (SPSS) 23 was used to perform the data validation test. This study identifies 77 causes under 14 major groups and ranked them based on the mean and RII. The top five major groups of causes are management-, consultant-, technology-, labour- and contractor-related causes. The top five causes are unawareness of safety-related issue, lack of personal protective equipment, lack of safety eliminating/avoiding design, unfit equipment, lack of knowledge and training on equipment. This study will help the project participants and authorities to know and understand the various characteristics and linkage of causes of construction accidents to improve the construction safety management. It contributes to the body of knowledge, as it reveals for the first time the causes of accidents in the Bangladeshi construction industry.