scholarly journals Ontology-Based Representation and Reasoning in Building Construction Cost Estimation in China

2016 ◽  
Vol 8 (3) ◽  
pp. 39 ◽  
Author(s):  
Xin Liu ◽  
Zhongfu Li ◽  
Shaohua Jiang
Keyword(s):  
Cost Estimation ◽  
Construction Cost ◽  
Building Construction

scholarly journals Comparative Cost Estimation of Residential Building

2021 ◽  
Vol 9 (8) ◽  
pp. 2735-2739
Author(s):  
Prof. Amit Kale
Keyword(s):  
Construction Industry ◽  
Cost Estimation ◽  
Construction Management ◽  
Research Effort ◽  
Construction Project ◽  
Residential Building ◽  
Construction Cost ◽  
Building Construction ◽  
Estimation Methods ◽  
Comparative Cost

Abstract: A construction project of any building is mainly based on 3 important steps that are planning, Cost Estimation of the building and proper execution of construction of the building. Construction cost estimation has the lion’s share of the research effort in construction management. The Objective is to analyze the effectiveness of various cost estimation methods by comparing traditional and various online websites. This study will provide more accurate estimates that save time and minimize errors. The research conducted will be helpful for estimation of construction, also proving how the introduction of IT sector in construction industry is turning out to be beneficial. Keywords: Estimation, Construction Management, Online Websites, minimize errors

scholarly journals A Review of Building Construction Cost Research: Current Status, Gaps and Green Buildings

2021 ◽  
pp. 1-17
Author(s):  
Ming Hu ◽  
Miroslaw Jan Skibniewski
Keyword(s):  
Cost Estimation ◽  
Construction Cost ◽  
Building Construction ◽  
Estimation Methods ◽  
Current Status ◽  
Cost Overrun ◽  
Labor Costs ◽  
Cost Overruns ◽  
Sustainable Building ◽  
Parametric Cost Estimation

An overall scoping review was conducted to examine research on building construction costs in the past decades. The aim is to provide a better understanding of conventional building construction cost estimation methods, gaps and potential improvement strategies that may mitigate the high risk of the cost overrun in conventional and sustainable building. This study first examined the components included in a building's construction cost and the commonly used calculation methods for cost estimation. Then, additional components included for sustainable buildings were identified and explained. The causal factors for construction cost overruns in sustainable building werediscussed as well. The findings concluded the following: (a) there is no consistent cost definition used in the industry; (b) a variety of cost estimation methods create ambiguity and confusion; and (c) newer cost estimating methods and tools, such as parametric cost estimation, which integrate risk and uncertainties have not been broadly adopted by the building industry. The current practice used to determine a sustainable building's cost estimation is the same traditional method that has been used over several decades, which is based on the material and labor costs. Such a conventional approach does not consider other factors, including the complexity of the sustainable building system, an organization's environment, and the capability of teams, among others. To respond to such a knowledge gap, a comprehensive and consistent cost estimation framework was proposed to integrate risk and uncertainty consideration, which is particularly prevalent in sustainable building.

Factors affecting the accuracy of cost estimate during various design stages

2019 ◽  
Vol 18 (4) ◽  
pp. 787-819
Author(s):  
Tala Hassan Dandan ◽  
Ghaleb Sweis ◽  
Lilana Salem Sukkari ◽  
Rateb J. Sweis
Keyword(s):  
Cost Estimation ◽  
Online Survey ◽  
Construction Cost ◽  
Project Managers ◽  
Cost Estimate ◽  
Building Construction ◽  
Cost Estimates ◽  
Content Type ◽  
Factors Affecting ◽  
Order Of Magnitude

Purpose The purpose of this paper is to identify factors affecting cost estimate accuracy in each of five design stages preceding building construction: order of magnitude, conceptual/schematic, detailed design, construction document and bid phase. Design/methodology/approach Data were collected using an online survey completed by 138 respondents who work in design consultancy firms in Jordan, including project managers, architects and quantity surveyors (QSs). Survey responses were analyzed using descriptive statistics. Confirmatory interviews and case study comparisons were used to confirm the statistical analysis results. Findings The results of this study indicated that each design stage’s cost estimate was affected by several factors. Two significant factors were common across four of the five design stages: client experience and project team experience. In addition, a high level of agreement was observed among the project managers, architects and QSs regarding the factors affecting cost estimate accuracy. Originality/value Accurately estimating building construction costs during the design process has posed a challenge for designers and their clients in Jordan. Despite the care and effort involved in preparing cost estimates in each of the five design stages, deviations are commonly observed. Because the accuracy of building construction cost estimates directly affect the success or failure of a project, the results of this study can be used to reduce uncertainties in building construction cost estimation and subsequently increase the likelihood of project success

AN APPROACH FOR SAFETY COST ESTIMATION OF BUILDING CONSTRUCTION

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Senem Bilir ◽  
G. Emre Gurcanli
Keyword(s):  
Risk Assessment ◽  
Cost Estimation ◽  
Construction Projects ◽  
Unit Area ◽  
Residential Buildings ◽  
Health And Safety ◽  
Construction Cost ◽  
Building Construction ◽  
Technical Specifications ◽  
Residential Projects

Small or middle scaled residential projects have a big share in the industry and majority of the fatal accidents usually occur on such work sites. In this study, drawings, technical specifications, bill of quantities of 25 small or middle scaled concrete residential buildings with total areas that vary between 252 and 221.979 m2 in Istanbul were examined. The study aims to give an approach for safety cost estimation for the early stages of construction bidding phase using risk assessment activities and construction project scheduling by focusing on construction activities. Additionally, a cost analysis was performed and the results were compared and Primavera P6 was utilized for scheduling, and risk assessment was conducted using the techniques applicable for construction projects (i.e., L matrix and Fine-Kinney). Finally, activity-based techniques were used for cost estimation. The results of this study reveal that the percentage of occupational health and safety (OHS) cost to the total construction cost is 2.6%. Also, to comply with the current legislation and minimize risks; 0.95 USD per man-hour should be spent according to 2013 rates and OHS cost per unit area was found as approximately 9.37 USD.

scholarly journals Application of Boosting Regression Trees to Preliminary Cost Estimation in Building Construction Projects

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Yoonseok Shin
Keyword(s):  
Cost Estimation ◽  
Construction Projects ◽  
High Performance ◽  
Learning Algorithm ◽  
Early Stage ◽  
Construction Project ◽  
Regression Tree ◽  
Building Construction ◽  
Regression Problem ◽  
Additional Information

Among the recent data mining techniques available, the boosting approach has attracted a great deal of attention because of its effective learning algorithm and strong boundaries in terms of its generalization performance. However, the boosting approach has yet to be used in regression problems within the construction domain, including cost estimations, but has been actively utilized in other domains. Therefore, a boosting regression tree (BRT) is applied to cost estimations at the early stage of a construction project to examine the applicability of the boosting approach to a regression problem within the construction domain. To evaluate the performance of the BRT model, its performance was compared with that of a neural network (NN) model, which has been proven to have a high performance in cost estimation domains. The BRT model has shown results similar to those of NN model using 234 actual cost datasets of a building construction project. In addition, the BRT model can provide additional information such as the importance plot and structure model, which can support estimators in comprehending the decision making process. Consequently, the boosting approach has potential applicability in preliminary cost estimations in a building construction project.

Prozesslücken modellbasierter Baukostenermittlung aus ausgewählter Akteurskonstellation/Process gaps of model-based construction cost estimation from selected constellation of actors

Bauingenieur ◽  
2021 ◽  
Vol 96 (03) ◽  
pp. 70-78
Author(s):  
Sara Bender ◽  
Christian Stoy
Keyword(s):  
Cost Estimation ◽  
Construction Cost ◽  
Model Based

Die korrespondierenden und bestimmenden Erfolgsfaktoren von Bauprojekten sind im Wesentlichen Qualität, Termine und Kosten. Die Kostenplanung ist deshalb bereits in frühen Phasen ein Bestandteil der Planungsleistung und hat maßgeblich Einfluss auf das Für und Wider einer Projektumsetzung. Im Rahmen der Digitalisierung wurden digitale Werkzeuge und neue Prozessabläufe in der Baubranche etabliert. Die modellbasierte Baukostenermittlung findet in BIM-basierten Bauprojekten Anwendung und bezieht Elementmengen und Informationen aus digitalen Bauwerksmodellen, die aus Objekten mit alphanumerischen und grafischen Eigenschaften bestehen. Die modellbasierten Kostenplanungsprozesse sind wissenschaftlich nicht hinreichend belegt und unterliegen keiner einheitlichen Vorgehensweise. Über Literaturquellen wird ein idealtypischer modellbasierter Soll-Kostenplanungsprozess eruiert, der durch Experteninterviews und deren Auswertung anhand einer qualitativen Inhaltsanalyse überprüft wird. Das Ergebnis ist ein Ist-Kostenplanungsprozess aus der aktuellen Praxis, der Abläufe beschreibt und Prozesslücken bei der Integration von Fachplanermodellen sowie Kostenkontrolle und Kostensteuerung aufzeigt.

Comparison between the separating efficiency of an improved high-side weir overflow and a hydrodynamic Storm KingTM separator

1999 ◽  
Vol 39 (9) ◽  
pp. 177-184 ◽  
Author(s):  
G. Luyckx ◽  
G. Vaes ◽  
J. Berlamont
Keyword(s):  
Cost Estimation ◽  
Construction Cost ◽  
The Other ◽  
Scale Model ◽  
Surface Load ◽  
Storage Effect ◽  
Storm Events ◽  
Side Weir ◽  
High Side ◽  
Removal Efficiencies

Scale model tests were used to determine the efficiency relationships for a hydrodynamic separator (Storm KingTM) and a high-side weir overflow. With the help of these relationships optimal dimensions of an improved high-side weir overflow chamber could be found. The steady state efficiency for this improved overflow chamber seems to be comparable to that of a hydrodynamic separator, when both devices are subjected to the same surface load. On the other hand, during real storm events, the storage inside the overflow structure can play an important role. This role is investigated by calculating the removal efficiencies for both structures when 4 monitored storm events are used as input. When higher removal efficiencies are wanted, the storage effect gets more and more important and as a consequence the hydrodynamic separator can technically as well as economically compete with simpler structures like e.g. a high-side weir overflow. These findings are confirmed by a simple construction cost estimation.

Sign in / Sign up

Export Citation Format

Share Document