scholarly journals DEVELOPING A CONSTRUCTION-DURATION MODEL BASED ON A HISTORICAL DATASET FOR BUILDING PROJECT / STATYBŲ PROJEKTO REALIZAVIMO TRUKMĖS MODELIO, PAGRĮSTO ISTORINIAIS DUOMENIMIS, KŪRIMAS

2011 ◽  
Vol 17 (4) ◽  
pp. 529-539 ◽  
Author(s):  
Ming-Chiao Lin ◽  
Hui Ping Tserng ◽  
Shih-Ping Ho ◽  
Der-Liang Young
Keyword(s):  
Regression Model ◽  
Construction Projects ◽  
Predictive Accuracy ◽  
Predictive Ability ◽  
Duration Model ◽  
Prediction Errors ◽  
Building Projects ◽  
Model Based ◽  
Contract Duration ◽  
Building Project

The delay of vast building projects is still a common problem. This situation is extraordinarily severe to steel reinforced concrete (SRC) building projects that keep going to promote a new structure system in Taiwan's construction industry. The aim of this study is to develop a feasible contract duration model based upon few SRC building cases. A logical approach is employed to select and assure the “good” regression model identified when project characteristics were known and external uncertainties were reasonably estimated. Different necessary diagnostics had been adopted to examine the aptness of the model before inference. The cross-validation is used to validate the appropriateness of the variables selected and magnitudes of the regression coefficients. The mean of the square prediction errors (MSPR) is selected to measure the predictive ability of the model proposed, and the result shows that the predictive ability of the selected regression model could be adequate. Finally, several cases are taken to test the predictive accuracy of the model proposed, and the result shows that the actually necessary construction duration is considerably closed to the duration predicted by the mode. It is concluded that the predictive duration model proposed could be applicable to the SRC construction projects with a reasonable reliability. Santrauka Vėlavimas realizuojant stambius statybų projektus tebėra dažna problema. Ši situacija ypač rimta dirbant su gelžbetoninių statybų projektais, kuriais populiarinama naujų konstrukcijų sistema Taivanio statybų sektoriuje. Šiuo tyrimu siekiama sukurti tinkamą sutarties trukmės modelį, pagrįstą keliais gelžbetoninės statybos atvejais. Atrenkant ir užtikrinant, kad būtų sudarytas ,,geras“ regresijos modelis, kai projekto savybės žinomos, o išoriniai neapibrėžtumai pakankamai įvertinti, taikytas loginis metodas. Prieš darant išvadas modelio tinkamumas buvo išnagrinėtas naudojant skirtingas būtinos diagnostikos priemones. Naudojant kryžminį patikrinimą pagrindžiamas pasirinktų kintamujų tinkamumas ir regresijos koeficientų vertės. Siekiant įvertinti siūlomo modelio tinkamumą prognozuoti, apskaičiuotos vidutinės kvadratinės prognozavimo paklaidos (angl. Mean of the Square Prediction Errors, MSPR). Rezultatas rodo, kad pasirinktasis regresijos modelis prognozuoja gana gerai. Pagaliau pasirinkus kelis atvejus išbandomas siūlomo modelio prognozių tikslumas. Rezultatas rodo, kad faktinė bū tina statybų trukmė gana artima modelio prognozuojamai trukmei. Daroma išvada, kad siūlomą trukmės prognozių modelį galima taikyti gelžbetoninės statybos projektuose, o jo rezultatai bus gana patikimi.

scholarly journals A review of causes of variation order in the construction of terrace housing projects in Malaysia

2019 ◽  
Vol 277 ◽  
pp. 03013
Author(s):  
Noraziah Mohammad ◽  
Zabidi Hamzah
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Construction Project ◽  
Extensive Literature ◽  
Time Cost ◽  
Construction Time ◽  
Building Projects ◽  
Housing Projects ◽  
Building Project

Variation order refers to any changes from the scope, plan, specification or contract document in the construction project. This changes of work is a common problem in construction projects in Malaysia. It is inevitable in any construction project and this problem can become more serious when variation order causes work progress to be impaired as a results it increased the construction time and cost that affects the construction industry in Malaysia. This paper critically review the causes of variation order in the construction industry on the double-storey terrace housing project in Malaysia. The discussions began with the construction industry in Malaysia and then related parties involved in the construction industry. The extensive local and abroad literature review on the definitions of variation order and analysis of past studies conducted on variation order and the previous study of the prediction model of variation. The extensive literature on variation order in the construction of building project may help to improve the performance in term of time, cost and quality of the construction of building projects in Malaysia.

scholarly journals An Analysis of Construction Failure Factors to Stakeholder Coordinating Performance in the Finishing Phase of High-Rise Building Projects

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Viet T. Nguyen ◽  
Sy T. Do ◽  
Nhat M. Vo ◽  
Thu A. Nguyen ◽  
Son V. H. Pham
Keyword(s):  
Factor Analysis ◽  
Construction Projects ◽  
Project Planning ◽  
Analysis Method ◽  
Building Projects ◽  
High Rise ◽  
High Rise Building ◽  
Building Project ◽  
Construction Works ◽  
Failure Factors

A poorly coordinated performance among stakeholders in the finishing phase can impair the performance of a high-rise building project. Therefore, it is necessary to analyze construction failure factors (CFFs) to stakeholder coordinating performance (SCP) in the finishing phase of high-rise building projects and to uncover their underlying relationships. CFFs to SCP in construction projects, especially in the finishing phase of high-rise building projects, have not yet been discovered. The study identified 30 CFFs to the SCP and ranked them according to the perspective of the stakeholders, including owners/consultants and contractors/subcontractors. Additionally, four factors of the CFFs, namely, traditional adversarial relationship, poor project planning and organization, incompetent parties, and delays of parties toward construction works were extracted by the factor analysis method. This study fills the gap in knowledge related to the coordination performance in construction projects. The findings could help stakeholders to enhance their coordinating performance in high-rise building projects.

scholarly journals ENVIRONMENTAL SECURITY STRUCTURE FORMING THE GROUNDWORK FOR A TERRITORIAL ENVIRONMENTAL PASSPORT

2020 ◽  
Vol 47 (1) ◽  
pp. 126-137
Author(s):  
A. L. Bolsherotov
Keyword(s):  
Environmental Pollution ◽  
Construction Projects ◽  
Geographical Area ◽  
Environmental Safety ◽  
Point Of View ◽  
Building Projects ◽  
And Control ◽  
Building Project ◽  
Security Structure ◽  
Relevant Factors

Abstract. Aim. The aim of the study is to develop an environmental passport based on the structure of integrated environmental safety for construction projects. With each year that passes, environmental problems are coming increasingly to the fore. As part of mitigation efforts, an environmental passport is required to assess and control the environmental safety of construction areas and building sites.Method. The study is based on the development of a sound model of integrated environmental safety in construction projects and a methodology for calculating its indicators, in particular, the indicator of “degree of concentration”. The methodology of ranking the factors by importance is applied.Results. The structure of a building site's environmental passport is presented, taking the entire spectrum of its direct impact and environmental pollution into account, as well as the indirect impact, energy efficiency and autonomy of the site. The scope of the environmental passport comprises the entire building lifecycle, from design to operation and liquidation. An environmental passport en-ables the identification of problematic impacts on the geophraphical area from an environmental point of view, as well as giving recommendations for resolving problems. The threshold of environ-mental safety is set for each geographical area under assessment (i.e., for each building project and geographical area, it is determined by the composition of relevant factors) and the existing level of environmental pollution is determined along with the ecological reserve of the area and its steady state range, i.e., the acceptable level of deviation of environmental safety indicators, which depends on temporary factors and the objective reality of the functioning of the infrastructure of the evaluated territory. For the design and construction of building projects, indicators of environmental reserve and technogenic pressure of the facility are of fundamental importance when making decisions.Conclusion. The article presents a rational assessment of the main indicators of the environmental pass-port, providing the structure of a comprehensive assessment of environmental safety. The research results are presented and the scope of the environmental passport proposed in the assessment of geo-graphical areas and evaluation of facilities and design.

scholarly journals Effect of Manpower and Resource Factors on Labor Productivity at House Building Projects in DHA Lahore

2021 ◽  
Vol 1 (1) ◽  
pp. 12-20
Author(s):  
S. Mutahir Hussain Shah ◽  
Muhammad Nawaz ◽  
Aimen Batool
Keyword(s):  
Literature Review ◽  
Construction Industry ◽  
Labor Productivity ◽  
Construction Projects ◽  
Project Manager ◽  
Quality And Safety ◽  
Building Projects ◽  
Low Performance ◽  
Building Project ◽  
House Building

Construction industry suffers numerous issues and complicated factors like price, period, quality and safety. It is said that Construction projects are versatile because they associate with contractors, architects, advisers, designers, the project owners, etc. Keeping in view of above factors, objective of this research is to highlight those factors which have impact on labor productivity in house building project. Through literature review as well as discussion with different consultants, several factors of productivity were identified. Out of which 20 factors were selected, which were later categorized into two sets, for analyzing in the current study. A comprehensive questionnaire was prepared and sent to project manager, engineers, designers, and builders. It was found, that total expense of construction comes to much higher as it was originally calculated. It is suggested that human resource should be developed through an effective and well planned training program, so that construction project do not suffer due to low performance. The mentioned factors are supposed to help in completed the construction projects effectively.  

scholarly journals Usage of Interface Management System in Adaptive Reuse of Buildings

Buildings ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 105 ◽  
Author(s):  
Ekin Eray ◽  
Benjamin Sanchez ◽  
Carl Haas
Keyword(s):  
Construction Projects ◽  
Adaptive Reuse ◽  
Project Delivery ◽  
Interface Management ◽  
Building Projects ◽  
Planning Methods ◽  
New Construction ◽  
Definition Of ◽  
Building Project

Adaptive reuse of buildings is considered a superior alternative for new construction in terms of sustainability and a disruptive practice in the current capital project delivery model for the renewal of today’s built environment. In comparison to green-field construction projects, adaptive reuse projects require distinct stages, definition of interfaces, decision gates, and planning methods in order to secure the success of the building project. Unfortunately, little research has been done regarding establishing feasible systems for the planning, assessment, and management of adaptive reuse projects, leading to underperforming building projects outcomes. Interface management (IM) can improve renovation projects outcomes by defining appropriate ways to identify, record, monitor, and track project interfaces. IM has the potential of bringing cost and time benefits during adaptive reuse projects execution. The aim of this study is to develop a reference framework for implementing IM for adaptive reuse projects. First, the inefficiencies of redevelopment projects are explained inside of a circular economy (CE) context. Second, an ontology of IM for adaptive reuse projects is defined based on the current barriers to adaptive reuse and the most common interface problems in construction projects. Third, the defined ontology is expanded through a case study by showing examples of adaptive reuse barriers on a case project, and how IM could have been part of the solution for these problems. Finally, this study concludes with the suggestions on interface management systems (IMS) implementation for future adaptive reuse projects.

Model for Evaluating Uncertain Project Duration Considering Construction Interface Problems

2013 ◽  
Vol 479-480 ◽  
pp. 1160-1169
Author(s):  
Shih Hsu Wang ◽  
Yu Ting Lai ◽  
Jang Jeng Liu ◽  
Wei Chih Wang
Keyword(s):  
Construction Projects ◽  
Work Group ◽  
Interface Problems ◽  
Duration Model ◽  
Building Projects ◽  
Probabilistic Scheduling ◽  
Activity Duration ◽  
Proposed Model ◽  
The Impact ◽  
Schedule Network

Many probabilistic scheduling models have been developed to determine the duration of construction projects. However, these models are not appropriate to capture the effect of the factors that are involved construction interface problems on the durations of multiple activities. This work presents a simulation-based probabilistic scheduling model that includes the impact of construction interface problems on the duration of building projects. The proposed model is established according to an activity duration model and a work-group (WG)-based schedule network. The activity duration model is applied to reflect the effects of general factors on the duration of each activity; the WG-based schedule network is employed to evaluate the effects of construction interface problems on the durations of multiple activities. The results of applying the proposed model to an example project reveal that the duration of a project can be over-optimistically estimated if the effects of construction interface problems are neglected.

scholarly journals Explicating Mechanical and Electrical Knowledge for Design Phase of Green Building Projects

2016 ◽  
Vol 15 (01) ◽  
pp. 1650002
Author(s):  
Zohreh Pourzolfaghar ◽  
Rahinah Ibrahim ◽  
Nor Mariah Adam
Keyword(s):  
Conceptual Design ◽  
Construction Projects ◽  
Green Building ◽  
Design Phase ◽  
Building Projects ◽  
Flow Problems ◽  
Conceptual Design Phase ◽  
Construction Knowledge ◽  
Building Project

Construction projects usually encompass numerous disciplines, requiring the integration of knowledge from civil, mechanical, electrical and other engineering domains. Some researchers contend that the integration of construction knowledge and experience at the early design phase would improve the overall project performance. Domination of tacit knowledge during design phase of building projects is the major source of knowledge flow problems between involved professionals. Therefore, this study intends to explicate the required mechanical and electrical knowledge which has to be considered during the conceptual design phase of a green building project. To fulfil this goal, a case study has been conducted to specify the entity of the required mechanical and electrical knowledge. The primary method for the data collection here is observation. Furthermore, this study employs the triangulation method in order to validate the collected data. The results contain the required mechanical and electrical knowledge which has to be considered during the conceptual design phase of a green building project.

scholarly journals Factors Affecting the Performance in the Implementation of Government Building Construction Projects: A Case Study in Bole Sub- City of Addis Ababa

2020 ◽  
Author(s):  
Serkalem Molla ◽  
Emer Quezon ◽  
Eyob Mekonnen ◽  
Woyesa Ararsa ◽  
Dumesa Gudissa ◽  
...  
Keyword(s):  
Construction Projects ◽  
Raw Materials ◽  
Addis Ababa ◽  
Commodity Prices ◽  
Building Projects ◽  
Public Building ◽  
Factors Affecting ◽  
Importance Index ◽  
The Government ◽  
Building Project

Building project implementation has so many issues and complex performance, such as time, cost, quality, and safety. This study identified and assessed the essential factors influencing the implementation of public building projects, particularly in the Bole Sub-city of Addis Ababa. There were 46 factors identified, validated, and divided into 9 categories. Questionnaires are distributed to 120 respondents, of which 8 for owners, 25 for consultants, 86 for contractors, and one head of the office. The key factors decided upon were: liquidity of the organization, improved availability of commodity prices for people with high experience and expertise, and the quality of equipment and raw materials in the project. The agreement between the parties on the ranking of factors was calculated based on their Relative Importance Index. Besides, the value of the Cronbach’s Alpha for variables calculated above 0.7, which means the data and scale are reliable and accepted for further analysis to correlate the different groups of factors. Results showed that cost, time, quality, productivity, and customer satisfaction are the top five essential factors affecting the performance of the government public building in the study area.

scholarly journals Causes of Time Overrun in Construction of Building Projects in Pakistan

2019 ◽  
Vol 9 (1) ◽  
pp. 3762-3764
Author(s):  
F. A. Soomro ◽  
M. J. Memon ◽  
A. F. Chandio ◽  
S. Sohu ◽  
R. Soomro
Keyword(s):  
Construction Projects ◽  
Time Estimation ◽  
Developed Countries ◽  
Mitigation Measures ◽  
Relative Importance ◽  
Building Projects ◽  
Late Delivery ◽  
Building Project ◽  
Financial Issues ◽  
Weather Impacts

Time overrun in construction projects is a very serious issue in developed countries. The main object of this research is to find the main causes of time overrun in the construction of building project and its possible mitigation measures. Quantitative approach was adopted in this research to achieve object and RIW (relative importance weight) approach was used for collecting data. Financial issues faced by the contractor, contractor’s inexperience, weather impacts, late delivery of material, mistakes in design, shortage of skilled labor, incompetent subcontractor and mistakes in time estimation were identified as main causes of time overrun in construction projects and possible mitigation measures were also proposed from experts. This research will help in giving awareness to stakeholders to narrow down the factors of time overrun in construction projects in Pakistan.

scholarly journals An Integrated Decision Support Model Based on BWM and Fuzzy-VIKOR Techniques for Contractor Selection in Construction Projects

2021 ◽  
Vol 13 (12) ◽  
pp. 6933
Author(s):  
Aziz Naghizadeh Vardin ◽  
Ramin Ansari ◽  
Mohammad Khalilzadeh ◽  
Jurgita Antucheviciene ◽  
Romualdas Bausys
Keyword(s):  
Construction Projects ◽  
Construction Project ◽  
Water Channel ◽  
Multicriteria Decision Making ◽  
Decision Support Model ◽  
Cost Overruns ◽  
Contractor Selection ◽  
Model Based ◽  
Fuzzy Vikor ◽  
Bid Price

Sustainable development of any country to some extent depends on successful accomplishment of construction projects, particularly infrastructures. Contractors have a key role in the success of these projects. Hence, the selection of a competent contractor as a complicated and hard decision process has a vital importance in the destiny of any construction project. Contractor selection is in essence a multicriteria decision-making that ought to encompass so many aspects of the project and the client’s requirements on one hand and the capabilities and past records of the contractors on the other hand. Failure in selecting a competent contractor may cause time and cost overruns; quality shortcomings; increasing in claims, disputes and change orders; and even failure of the project. In spite of deficiencies of selecting a contractor by the rule of “the lowest bid price”, it still prevails in many countries including Iran. In this paper, a new contractor selection model based on the best-worst method (BWM) and well-known Fuzzy-VIKOR techniques is proposed as a solution to overcome the deficiencies of the traditional “lowest bid price” rule. An illustrative example of a water channel construction project verified the applicability of the proposed model in practice.

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