Digital twin can be defined as a virtual representation of a physical asset enabled through data and simulators for real-time prediction, optimization, monitoring, controlling, and improved decision making. Recent advances in computational pipelines, multiphysics solvers, artificial intelligence, big data cybernetics, data processing and management tools bring the promise of digital twins and their impact on society closer to reality. Digital twinning is now an important and emerging trend in many applications. Also referred to as a computational megamodel, device shadow, mirrored system, avatar or a synchronized virtual prototype, there can be no doubt that a digital twin plays a transformative role not only in how we design and operate cyber-physical intelligent systems, but also in how we advance the modularity of multi-disciplinary systems to tackle fundamental barriers not addressed by the current, evolutionary modeling practices. In this work, we review the recent status of methodologies and techniques related to the construction of digital twins mostly from a modeling perspective. Our aim is to provide a detailed coverage of the current challenges and enabling technologies along with recommendations and reflections for various stakeholders.

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Digital Twin: Values, Challenges and Enablers From a Modeling Perspective

https://uwe-repository.worktribe.com/preview/909609/1.%20ADVEI-D-16-00028R2.pdf

Big Data in the construction industry

Augmented Reality (AR) interfaces have been studied extensively over the last few decades, with a growing number of user-based experiments. In this paper, we systematically review 10 years of the most influential AR user studies, from 2005 to 2014. A total of 291 papers with 369 individual user studies have been reviewed and classified based on their application areas. The primary contribution of the review is to present the broad landscape of user-based AR research, and to provide a high-level view of how that landscape has changed. We summarize the high-level contributions from each category of papers, and present examples of the most influential user studies. We also identify areas where there have been few user studies, and opportunities for future research. Among other things, we find that there is a growing trend toward handheld AR user studies, and that most studies are conducted in laboratory settings and do not involve pilot testing. This research will be useful for AR researchers who want to follow best practices in designing their own AR user studies.

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A Systematic Review of 10 Years of Augmented Reality Usability Studies: 2005 to 2014

From BIM to extended reality in AEC industry

Data acquisition technologies for construction progress tracking

Research has identified various beneficial capabilities for augmented reality technologies in the AEC industry such as virtual site visits, comparing as-built and as-planned status of projects, pre-empting schedule disputes, enhancing collaboration opportunities, and planning/training for similar projects. This paper provides an expanded foundation for future research by presenting a statistical review of augmented reality technology in the AEC industry. The review is based on articles found within eight well-known journals in architecture, engineering, construction, and facility management (AEC/FM) until the end of the year 2012. The review further narrows the literature within these journals by considering only those 133 articles found through a key word search for “augmented reality.” The selected journal articles are classified within the following dimensions: improvement focus, industry sector, target audience, project phase, stage of technology maturity, application area, comparison role, and technology. The number of articles within these dimensions are used to identify maturing and emerging trends in the literature as well as to synthesize the current state-of-the-art of augmented reality research in the AEC industry. In summary, the AR literature has increasingly focused on the demonstration of visualization and simulation applications for comparison of as-planned versus as-built statuses of the project during the construction phase to monitor project progress and address issues faced by field workers. In addition, the future trend is toward using web-based mobile augmented systems for field construction monitoring.

/pdf/review-and-analysis-of-augmented-reality-literature-for-56tpmmut39.pdf

Review and analysis of augmented reality literature for construction industry

PurposeAccording to the construction literature, the number of projects applying integrated project delivery (IPD) principles is expected to increase in the new-normal era. However, given that the pandemic is not yet fully over, accurate and measurable data are not yet available. Also, there is a lack of empirical studies that could provide guidelines as to the application of IPD principles at the various stages of construction projects. Thus, the goal of this paper is to address this knowledge gap through case studies.Design/methodology/approachThis paper follows a multi-step research methodology, namely, a literature review, case study and focus group discussions in the context of Canadian construction projects.FindingsBased on the conducted literature review and focus group discussions, the authors identified: (1) new challenges in the various stages of the construction projects' life cycle, (2) their related proximity aspects (technological, organizational, geographical and cognitive) and (3) IPD principles that can address the identified challenges within their associated proximities. The results show that IPD relational principles can improve a project's organizational and cognitive proximities, while IPD digital integrative principles can enhance a project's geographical and technological proximities.Originality/valueThis study contributes to the theoretical checklists of challenges that the construction industry has experienced since the beginning of the pandemic, and to the practical guidelines of implementation of IPD principles to meet these challenges. The conducted case studies are timely and relevant, and their results provide new insights for key project stakeholders into the application of IPD to tackle new-normal challenges based on their proximity perspectives.

The new-normal challenges and IPD solutions: a Canadian case study

PurposeIntegrated project delivery (IPD) has attracted considerable attention in recent years, however only a few review studies captured the dynamic and evolving nature of this topic. The purpose of this study is to review the most recent IPD publications, in order to shed light on future research.Design/methodology/approachUsing a systematic review methodology, the study aims to synthesize the current IPD literature, and frame the latest research and development in this domain. A systematic review is conducted to identify the current state-of-the-art of IPD research and the latest research themes and trends in this domain. A bibliometric analysis is performed to explain characteristics of screened articles, and through a thematic analysis the latest themes and trends are recognized.FindingsIn this study, based on IPD characteristics (contractual-regulative, operational-cognitive and organizational-structural), research themes (legal, commercial, technological, procedural, cultural and structural), sub-themes and their associated trends are identified. The latest emerging trends are mostly related to the contractual characteristics of IPD, and are focused on the combination of IPD with new business models and developing contractual guidelines for promoting IPD applications in off-site and on-site construction projects.Originality/valueThis research contributes to the body of knowledge by synthesizing the state of the art of IPD in construction literature and exposing the latest research trends in this area. A theoretical framework of integration in an IPD context is developed, based on the literature. Finally, future areas of studies are discussed.

The latest operational, contractual and organizational trends in IPD literature: review and future directions

Construction sites contain vast amounts of information. Recent advances in image-based visualization techniques enable monitoring construction progress using interactive and visual approaches. Photographs capture construction information in great detail while allowing the user to absorb as much information as they need. Construction as-built images captures great detail yet excludes portions of the site which may become of interest to the project participants. To overcome limitations of existing imagebased monitoring techniques, this research focuses on an image-based virtual walk-through visualization approach to monitor construction sites. The use of a 3D model to create a virtual walk-through enables a comprehensive record and delivers the information in an intuitive manner. A pilot study is conducted to create several as-built 3D models from construction photographs. Then these 3D models are visualized in a 3D walk-through model. Within such an environment, the as-built construction objects are visualized to generate the status of construction progress. The study shows that this 3D image-based walk-through system introduces an advanced model that enables the user to have a realistic understanding of the construction site.

An exploration of image-based walk through technologies

PurposeRecent construction literature has been focusing more on integrative contracting approaches such as integrated project delivery (IPD). However, conceptual studies on integration in IPD literature are scattered and fragmented, that is, most of the studies only focused on the segmented dimension of integration. A systemic understanding of the concepts of integration in IPD project-based context is still lacking. To fill this gap, this paper analyzes two aspects of integration (dimensions and directions) in IPD literature and explores their extent in construction projects.Design/methodology/approachGrounded theory review and focus group discussion approaches were employed to perform a thorough conceptual review of the literature, frame the research into the theory and increase the fundamental understanding of the concept of integration in IPD literature.FindingsIn this study, IPD integrating techniques were identified and their integration dimensions and directions were discussed. Results show that integration in the project-based environment of IPD is a multidimensional construct. Based on organizational, contractual and operational characteristics of IPD projects, twenty-four integration mechanisms were identified and framed into seven clusters. The integration directions over project life-cycle were demonstrated in three contexts: (1) an on-site construction project, delivered traditionally, (2) an on-site construction project, delivered with IPD and (3) an off-site construction project, delivered with IPD.Originality/valueThis paper gathers the segments of integration into a comprehensive overview, which can help researchers and practitioners explore elements of IPD project success more precisely. A theoretical framework of integration clusters is developed, based on IPD literature. The impact of IPD on on-site versus off-site construction is illustrated from an integration direction perspective. Finally, future areas of studies for researchers and practitioners about the concept of integration in an IPD context are discussed. This paper provides a point of departure for future theoretical and empirical explorations.

Sara Rankohi

Papers

Review and analysis of augmented reality literature for construction industry

The new-normal challenges and IPD solutions: a Canadian case study

The latest operational, contractual and organizational trends in IPD literature: review and future directions

An exploration of image-based walk through technologies

The concept of integration in an IPD context: a grounded theory review