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Opportunities of Reality Capture in Construction Project Management: History
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Contributor: Godfred Fobiri , Innocent Musonda ,
Franco Muleya

Reality Capture (RC) is a state-of-the-art technology for digital data gathering and visualization of the actual environment through virtual means. RC has been extensively used for different applications within the built environment. According to Fobiri et al., RC has been extensively applied to digital cultural heritage documentation, accuracy assessment, project monitoring, building surveys, construction site monitoring, and quality control assessment. To effectively implement novel technologies into projects, professionals need to recognize the benefits and performance enhancements RC offers to the built environment.

  • Reality Capture
  • 3D laser scanning
  • photogrammetry
  • construction management

1. Pre-Construction Phase—Planning and Designing

Planning is a vital part of the construction process because it determines a project’s success in terms of time, cost, quality, and safety [1][2]. Inaccurate planning will lead to project failure [2][3]. The planning stage involves many stakeholders and includes forecasting, scheduling, cost analysis, and risk assessment [4]. These are carried out based on the type and kind of data gathered and available. In the early stages of a project, RC is crucial since it has the ability to acquire quick and accurate digital data. To increase efficiency and productivity at this level, the commercial sector has made large investments in research and development of new RC-related software [4]. The project planning team merged Reality Capture and real-world data to build context models that can completely resolve the existing built and natural surroundings during the planning and designing stages. Throughout the design stage, conceptual design, analysis, detailing, and documentation are all carried out. In the pre-construction phase, BIM data are used to inform scheduling and logistics. Traditional techniques are streamlined in the design phase by using various automated tools such as AutoCAD Autodesk, Navisworks, Revit, SketchUp, etc., software. In the design phase, data provided by RC photogrammetry drone footage help to create three-dimensional building information modeling (3D BIM) which becomes a reservoir of information. During the phase, RC can assist the project management team with a high level of detailed information on the site condition to aid in planning and designing to reduce the level of project uncertainty. By boosting communication and collaboration among the design team and functions, RC to BIM (scan-to-BIM) will improve the current administration and control in all parts of architectural practices. Incorporating information and knowledge repositories into various initiatives could also make them function more smoothly. This will ensure that all stakeholders have access to updated data and that information can be quickly transferred among starkholders [5].

Data Accuracy and Reliability

Most critical decisions that influence project success are taken at the planning stage. Project stakeholders usually take decisions based on the data gathered from the project site condition, clients brief, and soil condition. Therefore, the level of accuracy and reliability of project information is crucial for the project success, e.g., data inaccuracy, poor design, poor budgeting, and forecasting resulting in time and cost overruns. The project information aids architects in design preparation; structural engineers also rely on the same information for structural analysis and detailing. Quantity surveyors determine the project cost estimation and budget on the same data. Data acquisition carried out manually are saddled with challenges, such as time-consuming, error-prone, and infrequent [6][7], which have the tendency to affect the project outcome. Therefore, data gathered at the planning stage are crucial for entire project management, in quality, time, cost, and resources [8][9]. RC is a quick and effective method of producing a 3D dataset from project site circumstances [10]. Digital data from RC can greatly increase project effectiveness, precision, value, and safety since it consists of vital data such as geospatial data, nature/topography of land, surrounding environment, etc., offering a better advantage than the traditional methods [11]. The 3D model obtained through Reality Capture permits the replication of the physical world into a virtual environment to obtain valuable information for AEC professionals to easily produce project documentation accurately and efficiently [12].

Effectiveness and Efficiency of AEC Professionals

There are inefficiencies in the traditional method of delivery of AEC professionals—in terms of time and output. Design error and time wasted exist when putting together different parts of the blueprints. Several site visits during the designing phase use assumptions on hard-to-reach and difficult-to-measure areas and objects [10] thereby, increasing the level of risk of the project. Quantity surveyors spend lots of time creating quantity take-offs. Traditional methods of building project delivery, which are deemed inefficient and lead to time and expense overruns, are being phased out [13][14][15]. The situation becomes worse on a large and complex construction and infrastructural project. RC technologies help AEC professionals be more efficient and effective in infrastructural delivery because of the accurate and detailed data used for planning, designing, and decision making [16][17]. RC is employed in the planning phase to make effective and timely decisions. It also aids the consultants and contractors in designing and constructing a project that is feasible to build.

Site Condition and Design Visualization

The visual mental representations used by the designer during the design process are referred to as visualization during design. Through spatial representation, visualization allows for the generation, interpretation, and manipulation of data [18]. This is greatly enhanced when digital data of the site condition are presented for design. In other words, it is the mental pictures used by a designer when completing a design task that is improved, reducing the design errors and buildability issues. Predictability is improved because of the usage of the 3D models, enabling the assessment of the building and structural components of the design [19][20][21]. As a result, collaborating improves data distribution and reduces uncertainty. This will give parties a clear picture and understanding of the site condition for their input at the design phase of the project. Three-dimensional models provide vital elements to form a basis for other visualization technologies such as virtual, mixed, and augment reality (VR/MR/AR) [22].

Reduction in Project Risk

Many uncertainties increase the project risk in the implementation phase of construction projects. Unforeseen circumstances can lead to a variety of uncertainties and have a significant impact on the project’s performance [23][24][25]. RC offers an advantage to provide point clouds, a virtual representation of the site condition. Point clouds data give precise, valuable, and detailed information that is difficult to achieve by manual means. Therefore, it is imperative to gather initial data of the site condition using RC, proving precise and more detailed information for the planning and design phase.

Prevent Cost Overruns

Project cost overrun is a global concern with researchers and practitioners seeking a lasting solution through modern technology [25][26][27][28]. Among the identified critical causes of cost overruns is inaccurate design and budget preparation [2][29][30][31]. The design and cost budget preparation largely depend on the level of accuracy of data available for use. Poor and inaccurate project data affect the design and budget cost leading to a lot of project variations in design and cost. Using RC for initial data acquisition goes a long way to prevent cost overruns since the project cloud data give the project team an accurate and high level of details for designing and planning which reduces cost implications. The RC can help the project team predict any unforeseen variation in design and cost based on the project size, contract type, and initial site condition information. This allows the project team to address minor difficulties before they become major problems that might lead to project failure.

2. Construction Phase

During the execution phase, the actual construction is carried out in a practical manner based on the design, requirements, and budget as projected. Project construction logistics are coordinated with trades and contractors to ensure maximum timing and efficiency. The most significant deviations from typical methods are presently occurring during the project’s building phase. This portion of the literature examines the benefits of RC to the built environment during the construction phase.

Data Accessibility

A vast capacity of data is produced during the execution phase of every project; effective project management requires the use of this project data for reporting and decision making. Collecting project data manually for reporting and decision making is subjective to human error and is time-consuming [15][32]. Therefore, the provision of real-time digital data being made available remotely for decision making is imperative. RC has the capability to provide ongoing project data [10][33][34]. However, the request for extremely tailored projects keeps growing, and real-time data access has become critical. Project parties can address difficulties quickly by connecting with numerous project teams and using real-time data to satisfy changing client expectations [35]. Additionally, RC’s availability of real-time site data allows the project team to prioritize concerns and assign a risk score to subcontractors, allowing construction managers to work closely with high-risk teams to minimize dangers [36].

Site Layout Planning in Large-Scale Construction Projects

The arrangement of construction sites is having an impact on construction productivity, safety, and efficiency. Dynamic site layout planning (DSLP) explores the ongoing modification of construction facilities on-site, allowing temporary facilities to be relocated as the project moves forward [37]. In addition, construction sites are reported as an accident-prone industry and are said to have poor productivity [38][39]. The construction industry has the highest fatalities, with over 18% of deadly work-related injuries [40][41]. The site layout planning becomes complex, time-consuming, and confusing when performed manually. To address the issues of productivity and health and safety concerns, there must be an effective and well-planned construction site using the precise and detailed data on an existing site condition. This can be achieved when detailed site information is available; RC can immensely provide such data to plan the site space and layout effectively to avert chaotic site conditions, making the site free from accidents and improving productivity. Hammad et al. [37] undertook research to create a workflow for combining unmanned aerial vehicles (UAVs) and photogrammetry capabilities with the planning of the site payout, optimization, and BIM for site layout design automation in major construction projects. The study concluded that numerous characteristics might be examined using data from UAVs, including the closeness to access ways, distance between facilities, and location appropriateness; space optimized and internal transportation cost were gradually lowered.

Monitoring of Site Progress

It is critical to keep track of the advancement on the construction site during the construction period since the projects can benefit by cutting costs, shortening timeframes, and increasing quality. Effective progress control is critical for ensuring that infrastructure building is completed as quickly as possible. Walking across the infrastructure project site to track the progress of various activities takes time and it necessitates the extraction of information from construction designs, timelines, and cost, as well as information gathered on the job site [42]. Insufficient information on the project status results in errors and ineffective measures, causing setbacks and increased expenditures [43]. The use of digital tools to monitor and control projects would lower the chance of error and allow for timely corrective actions. To ensure project execution follows through as per the as-planned, progress monitoring is a key function for project management. This is carried out periodically to prepare a report for stakeholder decision making. This is to ensure that the project is performing according to the project objectives. Project stakeholders’ decisions are largely dependent on the project data collected for the report. Therefore, the collection of data that truly reflect the ongoing project in terms of cost, time, quality, and specification, is imperative for stakeholders’ decisions. Relatedly, timely reporting is crucial for quick decisions to put the project on track. One of the fields of RC application is construction site monitoring. It provides visual records of accurate data for construction progress monitoring and assessing the actual progress [43][44][45][46][47]. The application of RC for automated project progress monitoring offers incredible support to the project management and the successful completion of the project [10][48][49]. Duarte-Vidal [43] conducted a study on technology integration and interoperability in order to show how they can be used to monitor and control construction projects during the execution phase. The construction progress tracking can be achieved by using UAVs to digitally record the physical progress of a building site and by using point clouds acquired by photogrammetric techniques to record the physical progress of a construction site on a regular basis [21]. The construction sector has a poor track record in terms of productivity, which has been attributed to a lack of effective progress tracking periodically. The majority of existing manual systems do not provide the key project team with a common comprehension of project performance in real-time, making it difficult to detect any deviation from the original timeline. Using RC technologies, a novel automatic system for monitoring, updating, and controlling construction site activities in real time can be developed. This is conducted by leveraging advances in close-range photogrammetry to deliver an original approach capable of continuous monitoring of construction activities, with progress status determined at any time, all through the construction project life cycle [38].

Enhanced Stakeholders Collaboration

Due to the fragmented nature of the project team, poor coordination and communication between the teams usually exist [50]. Teams often work in isolation with outdated data and plans that are riddled with errors and omissions, having a large effect on project delivery, such as delayed decision making, poor/isolated site instruction, and lack of agreement and clear project direction. Most projects suffer as a result of poor stakeholders’ collaboration and communication. The lack of collaboration among AEC teams and the client affects quick decisions in real time. Changes not shared simultaneously and instantaneously brought across the stakeholders delayed decision making [22][51]. The digital data acquisition of ongoing construction projects produced by RC technologies enables and promotes new forms of information sharing, collaboration, communication, and accessibility [50][52][53][54].

Remote Construction Supervision and Control

Construction sites can be monitored and controlled remotely by gathering data from RC strategically positioned across the site. Data collected can include the stage of completion, location of raw materials, and quality of work, i.e., structural integrity of buildings. This is advantageous because it improves efficiency since the project team can monitor, give instruction, and control the direction of the execution without necessarily being at the construction site all the time [21].

Health and Safety Assessment

The construction industry is regarded as a high-risk occupation with an unwillingness to adapt. Human mistakes, dangerous job activities, equipment malfunctioning, and unsafe work environments result in construction site accidents. Moreover, accidents results and contribute to project delays and cost overruns. Using visual site condition analytics can lower the likelihood of workplace accidents. In comparison to other industries, the construction business has a high rate of injuries. This is because construction workers are frequently exposed to hazards on the job site, such as heights, falling objects, equipment, tools, and poisonous compounds [41]. As a result, construction businesses must adopt a practical method by utilizing RC to lower the likelihood of accidents occurring and teach workers how to avoid them. Sensor-based and wearable technologies for safety monitoring can also support RC to improve safety. Assessment of the digital data can help detect dangers on the job site and alert supervisors for prompt measures. The site data can be analyzed to assess project progress, safety, quality of work; and can help improve their health and safety. The acquired site data, can also be used to identify safety issues and images can be compared to accident data. When there is an impending threat on-site, project managers will be notified to hold a safety briefing. On-site accidents have a negative influence on personnel’s well-being, as well as project cost and timeliness [55][56]. Because of the distinctiveness and nature of operations, with the complexity of the work environment especially, high-rise construction projects are an unsafe profession. BIM and other digital technologies such as RC have been highlighted as useful tools for improving productivity, efficiency, and safety of the construction projects [57][58]. To improve construction health and safety management, several developing RC, such as laser scanning and photogrammetry, can be applied. Other emerging technologies and interventions for construction site safety are evolving [59][60].

Project Team Communication and Data Acquisition

Effective communication and information retrieval from the construction site are critical components of a successful construction project [61][62]. In the study, Pejoska et al. [61] initiates that the inclusion of RC technologies considerably enhances access to project data on the job site and effective communication when equated to more outdated data sources. RC technologies are used in the construction sector to collect field data and communicate it to stakeholders. RC enables rapid and easy access to data, allowing project stakeholders to determine remedial actions to save cost and time overruns instigated by performance mismatches. Several businesses are attempting to come out with a light weight tool, according to McHugh [50], to reduce the issues and difficulty of on-site data recovery. Due to increased visual benefits of RC technologies, parties can communicate more effectively while making comments and proposals for a given project. The presented visual capabilities and opportunities of RC technologies allow for increased communication among different parties participating in the building process when observing and giving comments and judgements for a given project phase. RC is among the successful means of gathering site data [33][62][63][64].

Enhance Assessment of Work Done and Approval for Payment

The current approaches to valuing work done and decision making, which is based on manual and paper reports, are often time consuming and challenging. Work done during the execution phase of the project requires a periodic assessment to determine the amount of financial resources invested into the project to date for certification and the reimbursement of the contractor. Usually, the joint measurement and assessment of work done are carried out by the client’s quantity surveyor and contractors’ quantity surveyor. The traditional paper based approaches are cumbersome and time-consuming, subjective and often results in claims and disputes [2]. By employing RC technologies and retrieving data through dependable automated methods, the analysis improves efficiency, accuracy, and quality [65]. Construction processes will be more dependable, transparent, productive, and efficient thanks to RC which has the capability of offering detailed digital data for visual inspection and assessment by all stakeholders. Calculating the exact volume of the earth is critical. The standard method of calculating the earth’s volume necessitates the use of measurements to gather a huge amount of information, which RC can be adopted for [66]. The study by Nguyen [16] presented practical solutions to increase the correctness and effectiveness of the process of quantity management by exploiting recent technical breakthroughs of the 4.0 industrial revolution and employing the opportunities and characteristics of BIM and RC technology. This lessens the time for contractors’ claim approvals since the evidence of work done can be readily accessible remotely. It is an intelligent method that automates payment procedures and lowers the potential delay from on-site construction processes [67].

As-Built Model Visualization

A few decades ago, developing a 3D digital model for a construction project before the commencement of a real project was a challenge, let alone for as-built models. However, a 3D project model can now be created employing RC technology that gives the impression of being in the actual world, before the project is visited physically. The visualization of a project as-built model incorporates numerous parametric data previously unavailable in a two-dimensional model. The model serves as a single source of data for all construction sections [18]. Remote control technologies enable a person to remotely access the complete project, including its interior and exterior areas [68]. RC is changing how data is acquired and enable safety improvement, better communication with all project participants, design verification, and can be used to choose appropriate methodologies to address accessibility and space challenges on construction sites [21]. Following the building phase, RC technologies reduce facility administration and maintenance time and cost since better understanding and efficiency, increased productivity, and effective communication is achieved through the ability to visualize the construction activities. RC applications offer a collaborating, three-dimensional, instantaneous platform for visualizing the project model to promote high-quality, high-safety, and defect-free construction projects [13][21][69]. TLS measurements in the form of 3D point cloud data can be used to virtualize the structure’s “as-built” design in steel-framed buildings [70].

RC Gives Life to Building Information Modeling (BIM)

In the design, engineering, and construction industries, BIM is rapidly growing. This is because of RC technology, which has evolved into one of the most important components of BIM, allowing for the capture of semantically rich geometric representations of 3D models in the form of point clouds [71]. BIM is an intelligent 3D model-based method that gives AEC professionals the needed insight and data to effectively design, build, and operate buildings. Architects make use of BIM to produce 3D models including information on physical and functional properties [26]. AEC practitioners may collaborate on synchronized models using BIM, giving everybody a maximum comprehension of their work aligned with the overall project allowing for efficient professional delivery. The data contained in the model establish behavior and connection between the components and the design element [6][72]. When model elements are altered, all the views are updated automatically in the floor plans, elevations, sections, and schedules. The data in the model help gain faster approval for payment since there is a realistic visualization of the intent design on the construction field. BIM increases the effectiveness and productivity of the construction phase by offering insight into a design’s constructability, as well as a better understanding of the building’s future operations and maintenance [73][74].
However, during the construction phase, there are possibilities of variations in design. The BIM model, therefore, requires an update from the actual construction. Without an update, it is considered a dead BIM because it does not reflect the true information of the ongoing project. The provision of accurate digital data for the BIM update is critical for successful project implementation, operation, and maintenance. The demand for accurate up-to-date digital data in the BIM update to improve the workflow and collaboration among AEC professionals [10] requires the use of RC technology. RC provides quick and efficient digital data of ongoing construction site conditions [10]. The 3D point clouds generated consist of vital data such as building geometry, stage of completion, construction typology, and material properties for BIM processes, offering a better advantage than the traditional construction methods [11]. This enables a scan-to-BIM workflow to be achieved for BIM analytics by evaluating the project performance in terms of cost, time, quality, and safety through the use of various BIM analytics software. BIM is a platform for creating and managing building data about a construction project throughout its lifecycle. The project lifecycle of a building also contains a stage of renovation, and terrestrial laser scanning is an efficient way to develop 3D BIM in their current state. Laser scanning is a non-contact method of capturing the shape of physical things and providing a precise depiction of the building geometry [75].

Scheduling and Cost Monitoring

The usage of RC application models is essential for keeping track of construction costs and schedules. Cost and time forecasts that are wrong have major financial ramifications on the project. The use of RC enables the updating of the combination of 4D and 5D BIM visualization, reducing the risk of unanticipated project cost and milestones [23]. This aids prompt stakeholder decision making on the remedial actions taken to keep the project cost and schedules on track for the project’s successful completion.

Productivity Measurement

Because of the increasing complexity of today’s large-scale building projects, schedules are very susceptible to delays. The earthwork processes are critical in underground construction sites. Combining two computer vision-based technologies, photogrammetry analysis can be used to evaluate the productivity of soil removal. Throughout the project execution, RC device photogrammetry is utilized to build periodic point clouds for the assessment of the volume of work done to determinate productivity [76].

Defect and Quality Assessment

Quality assessment was an expensive and laborious issue before the use of RC technology in construction. The flaw is sometimes overlooked, and the report is lost or ruined [77]. However, defect assessment becomes much easier and more successful with the help of RC. There are no chances of missing or failing to disclose damages when using the visualization capabilities of RC [65]. This operation does not require any physical labor. This defect and quality control system saves labor, money, and time [32]. RC is more effectively applied in construction quality assessment and building defect management than before. The as-built models produced by RC can be compared with the as-planned model for quality assessment and construction verification using a BIM analytics software. BIM is a big step forward in the digitalization of the construction process. The virtual BIM model is a repository of graphic data and other information that may be used to verify the geometry of a building’s structures. TLS close-range photogrammetry is the most efficient approach for collecting spatial data [78]. A study describes a method for examining the prefabricated wall panels using 3D laser scanning. After panel installation, a standard 3D laser scanner BLK 360 was used to acquire as-built data. Geometric metrics such as angles and lengths can be used to determine whether or not an installation satisfies the quality standard [79]. Quality assessment of complicated geometric shapes of the façade can be achieved by conducting an evaluation of as-built and as-designed panels using RC [80].
Offsite manufacturing (OSM) geometric compliance is critical for assuring proper fit-up, structural integrity, building system, performance, and assembly alignment on-site. A geometric digital twin (gDT) created through 3D scanning can be used to digitize an assembly to discover and fix any difficulties in advance [81]. Quality control is essential to a modular building project’s success, and it should be enhanced at every level of the process, from design to construction and installation. Existing methods for determining the assembly quality of a detachable floodwall, which are time-consuming and costly, rely mainly on traditional inspection and contact-type metrics [22]. The construction quality monitoring of blocks is critical in the construction of buildings. The total station device is widely used in traditional applications, but it has various disadvantages, such as a delayed measurement time, a high labor intensity, and a restricted amount of data points. The RC device terrestrial Laser Scanning (TLS) can be used to obtain efficient and precise hull block construction information [82]. In the AEC business, evaluating the quality of construction for conformance with the design purpose has proven to be a difficult process. Data capture techniques, such as 3D laser scanning and photogrammetry, have been used to create 3D as-built models for construction quality assessment. To execute the quality control assessment, the prepared as-built models and as-design BIM were then combined and changed in the Autodesk Navisworks environment. RC technologies have a lot of potential for assessing construction quality [83].

As-Built Digital Documentation

RC ensures up to date as-built documentation. The as-built documentation is critical to generating an as-built BIM model which is carried over to the operations and maintenance of completed assets. This information is also useful when a structure will need to be decommissioned or demolished [19][80][84][85]. The as-built 3D digital model contains objects, structures, and asset information for the operation, repairs, refurbishment, and maintenance of facilities by assessing the status of buildings. RC technologies are becoming increasingly prominent in the maintenance and measurement of infrastructure projects [86][87][88].

Reduction in Variations

Many difficulties confront the worldwide construction industry, including repeated cost and time overruns, which are exacerbated by deviations that occur during the construction process. Variation is one of the most controversial issues in construction contracts. Modernizing the sector using developing technology has been shown to reduce variances and provide other advantages. The effects of developing technology in reducing the incidence of deviations in building projects are investigated in a study by [89]. When properly implemented, emerging RC technology, such as drones, 3D Laser Scanning, and photogrammetry, as well as BIM, Virtual Reality (VR), and others, are proven to be valuable aids in preventing the development of difference.

This entry is adapted from the peer-reviewed paper 10.3390/buildings12091381

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