scholarly journals Implementation of MCA Method for Identification of Factors for Conceptual Cost Estimation of Residential Buildings

2013 ◽  
Vol 8 (1) ◽  
pp. 25-34 ◽  
Author(s):  
Michał Juszczyk ◽  
Agnieszka Leśniak ◽  
Krzysztof Zima
Keyword(s):  
Comparative Analysis ◽  
Cost Estimation ◽  
Construction Projects ◽  
Residential Buildings ◽  
Residential Building ◽  
Design Stage ◽  
Problem Solution ◽  
Key Factors ◽  
Early Design Stage ◽  
Select Group

Abstract Conceptual cost estimation is important for construction projects. Either underestimation or overestimation of building raising cost may lead to failure of a project. In the paper authors present application of a multicriteria comparative analysis (MCA) in order to select factors influencing residential building raising cost. The aim of the analysis is to indicate key factors useful in conceptual cost estimation in the early design stage. Key factors are being investigated on basis of the elementary information about the function, form and structure of the building, and primary assumptions of technological and organizational solutions applied in construction process. The mentioned factors are considered as variables of the model which aim is to make possible conceptual cost estimation fast and with satisfying accuracy. The whole analysis included three steps: preliminary research, choice of a set of potential variables and reduction of this set to select the final set of variables. Multicriteria comparative analysis is applied in problem solution. Performed analysis allowed to select group of factors, defined well enough at the conceptual stage of the design process, to be used as a describing variables of the model.

scholarly journals Development of Cost Estimation Models Based on ANN Ensembles and the SVM Method

2020 ◽  
Vol 30 (3) ◽  
pp. 48-67
Author(s):  
Michał Juszczyk
Keyword(s):  
Support Vector Machines ◽  
Cost Estimation ◽  
Construction Projects ◽  
Predictive Performance ◽  
Design Stage ◽  
Support Vector ◽  
Early Design Stage ◽  
Vector Machines ◽  
Structural Frames ◽  
The Cost

Abstract Cost estimation, as one of the key processes in construction projects, provides the basis for a number of project-related decisions. This paper presents some results of studies on the application of artificial intelligence and machine learning in cost estimation. The research developed three original models based either on ensembles of neural networks or on support vector machines for the cost prediction of the floor structural frames of buildings. According to the criteria of general metrics (RMSE, MAPE), the three models demonstrate similar predictive performance. MAPE values computed for the training and testing of the three developed models range between 5% and 6%. The accuracy of cost predictions given by the three developed models is acceptable for the cost estimates of the floor structural frames of buildings in the early design stage of the construction project. Analysis of error distribution revealed a degree of superiority for the model based on support vector machines.

CONSTRUCTION DEFECTS IN RESIDENTIAL BUILDING PROJECTS: PILOT STUDY

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Abdullah Almusharraf ◽  
Andrew Whyte
Keyword(s):  
Construction Projects ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Projects ◽  
Vast Number ◽  
Global Issue ◽  
Cost Controls ◽  
Construction Tasks ◽  
Construction Defects

A vast number of studies about construction defects have been published in different countries, confirming that construction defects are a global issue. This problem often adversely affects the budgets, timing, and quality of construction projects. The lack of understanding about which construction tasks are prone to defects make implementation more uncertain and increases the chances of defects. This study seeks to identify and understand the behavior and pattern of task actions that are more prone to defects through the anatomy process of a specific task. The first objective in this study was to identify, track, and record construction defects during the execution of a number of actions within a specified task. The second objective was quantifying which actions are more prone to construction defects and determining the reasons why. Fifteen case studies were conducted on residential buildings, which included 45 items focusing on the column sub-task. Initial results suggest that some actions within specific sub-tasks are more susceptible to defects. This research aims to improve the understanding of construction defects and solutions, enhance cost controls, reduce time overruns, and improve execution quality.

scholarly journals Open BIM-based quantity take-off system for schematic estimation of building frame in early design stage

2014 ◽  
Vol 2 (1) ◽  
pp. 16-25 ◽  
Author(s):  
Jungsik Choi ◽  
Hansaem Kim ◽  
Inhan Kim
Keyword(s):  
Construction Projects ◽  
Design Stage ◽  
Prototype System ◽  
Construction Costs ◽  
Building Frame ◽  
Early Design ◽  
Early Design Stage ◽  
Construction Automation ◽  
Time Required ◽  
Stage 1

Abstract Since construction projects are large and complex, it is especially important to provide concurrent construction process to BIM models with construction automation. In particular, the schematic Quantity Take-Off (QTO) estimation on the BIM models is a strategy, which can be used to assist decision making in just minutes, because 70–80% of construction costs are determined by designers' decisions in the early design stage [1]. This paper suggests a QTO process and a QTO prototype system within the building frame of Open BIM to improve the low reliability of estimation in the early design stage. The research consists of the following four steps: (1) analyzing Level of Detail (LOD) at the early design stage to apply to the QTO process and system, (2) BIM modeling for Open BIM based QTO, (3) checking the quality of the BIM model based on the checklist for applying to QTO and improving constructability, and (4) developing and verifying a QTO prototype system. The proposed QTO system is useful for improving the reliability of schematic estimation through decreasing risk factors and shortening time required.

scholarly journals TIME REDUCTION EFFECT OF THE ENHANCED TACT METHOD FOR HIGH-RISE RESIDENTIAL BUILDINGS

2015 ◽  
Vol 22 (7) ◽  
pp. 944-953 ◽  
Author(s):  
Donghoon LEE ◽  
Dong-Sub KIM ◽  
Gwang-Hee KIM ◽  
Sunkuk KIM
Keyword(s):  
Construction Projects ◽  
Critical Path ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Projects ◽  
Schedule Management ◽  
High Rise ◽  
Time Reduction ◽  
Reduction Effect ◽  
Line Of Balance

The finish work on high-rise residential buildings is performed simultaneously with mechanical and electrical construction work, which results in frequent work interference and delay. This significantly hinders efficient schedule management. Critical Path Method (CPM) is inefficient when applied to high-rise residential building projects in which work is repeatedly carried out for each floor. Line-of-Balance (LOB) is widely used for its effectiveness in managing repetitive work. LOB was developed into TACT and eTACT (enhanced-TACT) to combine heterogeneous works con­tinuously. In particular, the eTACT schedule management method has an advantage in that it is capable of systemati­cally connecting detailed construction, mechanical and electrical construction projects using a work planning template. This study evaluates the time reduction effect of the eTACT method for a high-rise residential building. A comparative analysis of data on 102 cases of non-applied projects and 44 cases of projects using the eTACT method over a period of 10 years is presented to verify its effectiveness. The result shows that finish work time was reduced by 25% or about 53 days on average.

scholarly journals Methods for rationalization of the design of residential buildings in classical antiquity

2013 ◽  
Vol 11 (3) ◽  
pp. 221-229
Author(s):  
Aleksandra Miric ◽  
Goran Jovanovic
Keyword(s):  
Comparative Analysis ◽  
Social Life ◽  
Residential Buildings ◽  
Residential Building ◽  
Physical Structure ◽  
Classical Antiquity ◽  
Housing Conditions ◽  
The Past ◽  
The Social ◽  
Functional Units

The description of residential buildings in the past is made possible by studying the physical structure of the preserved architectural and movable archaeological finds, and also by the analysis of the written (epigraphic and numismatic) material findings, as well as the analysis of the written literary works which, through the author?s subjectivity, documented the social life. That is why the knowledge of the classical antiquity construction handbooks can only contribute to the understanding of the architecture, housing conditions, and thus facilitate the reconstruction of the ancient houses. Works about residential buildings by Columella, Vitruvius and Faventinus, three authors from different periods of the mature antiquity, are fully preserved. This paper presents the results of a comparative analysis of their works, which indicate that the recommendations for determining the properties of various functional units within the residential building were similar over a longer period of time observed here.

scholarly journals Risk Assessment Model Based on Fuzzy Logic for Residential Buildings

2021 ◽  
Vol 29 (4) ◽  
pp. 37-48
Author(s):  
Namdeo Hedaoo ◽  
Amey Pawar
Keyword(s):  
Risk Factors ◽  
Construction Projects ◽  
Residential Buildings ◽  
Construction Project ◽  
Significant Risk ◽  
Fuzzy Model ◽  
Residential Building ◽  
Assessment Model ◽  
Response Strategy ◽  
Industry Professionals

Abstract Risk is involved in every construction project. Residential building construction projects comprise a variety of risks and are more likely to be affected due to their difficulty and many operations and threats. The study aims to identify the various risk elements and their effect on construction projects of residential buildings using a fuzzy approach with the help of MATLAB software. This study includes 60 risk factors recognised through an expert opinion and literature review. These factors are categorised into 7 major groups, i.e., construction, project manager, architect/consultant, contractor, owner, resources, and external environment-specific risk factors. A questionnaire was prepared and sent using emails based on the identified risk factors to be filled out by construction industry professionals in India and by conducting in-person interviews. Based on the risk severities obtained from the fuzzy model, the top 10 risk factors have been considered. As a result, for identified top severe risk factors, a significant risk response strategy was implemented.

scholarly journals Comparative Analysis of Energy Demand and CO2 Emissions on Different Typologies of Residential Buildings in Europe

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2436 ◽  
Author(s):  
Julià Coma ◽  
José Miguel Maldonado ◽  
Alvaro de Gracia ◽  
Toni Gimbernat ◽  
Teresa Botargues ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Co2 Emissions ◽  
Energy Demand ◽  
Residential Buildings ◽  
Residential Building ◽  
Cold Climate ◽  
Hot Water ◽  
Data Sources ◽  
Building Sector ◽  
Domestic Hot Water

The building sector accounts for one third of the global energy consumption and it is expected to grow in the next decades. This evidence leads researchers, engineers and architects to develop innovative technologies based on renewable energies and to enhance the thermal performance of building envelopes. In this context, the potential applicability and further energy performance analysis of these technologies when implemented into different building typologies and climate conditions are not easily comparable. Although massive information is available in data sources, the lack of standardized methods for data gathering and the non-public availability makes the comparative analyses more difficult. These facts limit the benchmarking of different building energy demand parameters such as space heating, cooling, air conditioning, domestic hot water, lighting and electric appliances. Therefore, the first objective of this study consists in providing a review about the common typologies of residential buildings in Europe from the main data sources. This study contains specific details on their architecture, building envelope, floor space and insulation properties. The second objective consists in performing a cross-country comparison in terms of energy demand for the applications with higher energy requirements in the residential building sector (heating and domestic hot water), as well as their related CO2 emissions. The approach of this comparative analysis is based on the residential building typology developed in TABULA/EPISCOPE projects. This comparative study provides a reference scenario in terms of energy demand and CO2 emissions for residential buildings and allows to evaluate the potential implementation of new supply energy technologies in hot, temperate and cold climate regions. From this study it was also concluded that there is a necessity of a free access database which could gather and classify reliable energy data in buildings.

Comparative Analysis of Natural and Stimulated Room Temperature of Residential Buildings in Hot Summer and Cold Winter Zone

2011 ◽  
Vol 71-78 ◽  
pp. 547-551
Author(s):  
Yong Fei Ning ◽  
Ze Hua Liu ◽  
Gang Chen ◽  
Jie Zhang
Keyword(s):  
Energy Consumption ◽  
Comparative Analysis ◽  
Room Temperature ◽  
Residential Buildings ◽  
Residential Building ◽  
Cold Winter

Based on long-term testing and recording of room temperate in a bedroom of residential buildings in the hot summer and cold winter zone, this assay focuses on comparative analysis of tested results and simulated results derived from the DeST software. It verifies the rationality and reliability of the DeST software, showing the feasibility that software DeST can be applied to analyze the energy consumption of residential building in hot summer and cold winter zone.

Close-Loop Cost Equation for Objects Manufactured by Milling

2003 ◽  
Vol 125 (3) ◽  
pp. 436-448 ◽  
Author(s):  
Uday A. Kulkarni ◽  
Han P. Bao
Keyword(s):  
Cost Estimation ◽  
Process Model ◽  
System Analysis ◽  
Development Stage ◽  
Milling Process ◽  
Multidisciplinary Optimization ◽  
Parametric Estimation ◽  
Design Stage ◽  
Estimation Model ◽  
Early Design Stage

One of the major drawbacks of present cost estimation models is their incapability of embracing effectively complete product development stage. Parametric estimation works well in early design stage, but when it comes to detail design stage, a more complete estimation is provided by process model based and detail estimation techniques. A major paradigm shift is proposed in this paper whereby “Cost” is to be considered as a design parameter from scientific perspective and it is to be treated as a design consequence rather than as an operational outcome. A comprehensive framework using System Analysis fundamentals is designed to study ‘’Process Cost” aspects of a part or a design. The paper gives detailed implementation of this new approach for objects manufactured largely by milling operation. The paper also suggests a methodology to extend this approach to other manufacturing processes. The proposed Generic Cost Estimation Model shows good agreement with cost estimation by commercial estimation software when applied to the objects manufactured by milling process. It also promises integration of “Cost” with other disciplines in Multidisciplinary Optimization and Collaborative Engineering. The integration is achievable through new information technology interface tools.

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