Integrated Sequential As-Built and As-Planned Representation with D4AR Tools in Support of Decision-Making Tasks in the AEC/FM Industry

The potentials of and barriers to the utilization of advanced computer systems in remote construction projects: case of the Kingdom of Saudi Arabia

“…In recent years, the development of laser scanning and video and image-based 3D reconstruction system is enabling remote and virtual walk through on actual construction sites. These systems have the ability to minimize the travel times of supervisors and may increase the frequency of progress, quality and safety inspections by providing project supervisors with systems that are easily applicable (Golparvar-Fard et al 2011, Jaselskis et al 2011. The utilization of Building Information Modeling (BIM) by the project team would provide a more streamlined business process, associated project and site management methodologies including complete facilitation of construction knowledge during the full lifecycle of a building project (Arayici and Aouad 2010).…”

“…Contractors experience difficulty attracting and retaining skilled workers; and it is difficult to procure and access materials and equipment and site's conditions has a negative impact on productivity (McAnulty and Baroudi, 2010) Construction costs can be reduced by 25% through efficient transfer of information by ACMS between the construction teams (Davidson andMoshini, 1990, Bowden, 2005) Misinterpretations and miscommunications of project results and needs issues; and a centralized decision-making process and lack of delegated authority to field personnel often hindered progress and communications (Kestle, 2009) ACMS use enables productivity enhancement of communication between project participants, reduction in project delays, alleviation of awareness of project issues among all parties, and easy access to and retrieval of project information Ingirige 2003, andStewart andMohamed, 2004) There is frequent shortage of materials, higher risk margins, serious delay in sorting out a number of project queries and Delays in decision-making and decisions are made autocratically, excessive costs, unfocused scope, and poor construction quality, unskilled workers, a lack of or no infrastructure (Justanyah and Sidawi, 2011and Sidawi, 2010a, b, 2012a ACMS use minimizes delays due to the arrival of updated drawings and documents, reduces visits to sites and traveling time to meetings, reduces time and money spent on disputes, automates repetitive routine processes, and eliminates paper reports Ingirige 2003, andStewart andMohamed, 2004) ASMC have the ability to minimize the travel times of supervisors and may increase the frequency of progress, quality and safety inspections by providing project supervisors with systems that are easily applicable (Golparvar-Fard et al, 2011, Jaselskis et al 2011). …”

Automated Progress Monitoring Based on Photogrammetric Point Clouds and Precedence Relationship Graphs

“…[16] proposes to use a colored cube with known size as target, which can be automatically measured to determine the scale. In [17] image-based approaches are compared with laser-scanning results. The artificial test data is strongly simplified and the real data experiments are limited to a very small part of a construction site.…”

“…Only relative accuracy measures are given since no scale was introduced to the photogrammetry measurements. [17] and [18] use unstructured images of a construction site to create a point cloud. The orientation of the images is performed using a Structure-from-Motion process (SFM).…”

High-precision vision-based mobile augmented reality system for context-aware architectural, engineering, construction and facility management (AEC/FM) applications

“…After the physical models (e.g., the generated 3D point cloud models) and the cyber models (e.g., Building Information Modeling (BIM)) are aligned, they can be compared to determine the actual state of the physical elements on construction site versus the expected state. Some researchers have proved that the fused (aligned) cyber-physical model is accurate to within millimeters (Golparvar-Fard et al 2011) and can be used to predict the actual construction progress versus the planned cyber model with high accuracy, even when visual obstructions are present (2010). Recent works such as Carozza et al (2012) extend marker-less augmented reality systems for urban planning purposes.…”