scholarly journals SORTING SUBCONTRACTORS’ ACTIVITIES IN CONSTRUCTION PROJECTS WITH A NOVEL ADDITIVE-VETO SORTING APPROACH

2019 ◽  
Vol 25 (4) ◽  
pp. 306-321 ◽  
Author(s):  
Rachel Perez Palha ◽  
Adiel Teixeira De Almeida ◽  
Danielle Costa Morais ◽  
Keith W. Hipel

Selection processes in civil engineering infrastructure projects might require more time and effort than the decisionmakers involved in these projects are normally prepared to devote to running them. A novel approach is proposed to sort these activities into classes that represent their impact on the project, namely additive-veto sorting model, which should be considered before any bidding procedure. Therefore, problems regarding the client’s satisfaction caused by subcontractors can be avoided, and the decision-makers involved in the selection problem can devote to each class an effort compatible with the impact that activity might have on the project. The novelty of this method is that it was built to reflect the quasi-compensatory rationality of decision-makers in the construction industry; it provides them with insights on subcontractors’ activities, and it is grounded on and inspired by a real case study. The new parameters proposed within this model introduce the idea of vetoing an activity being assigned to a class when this activity is incompatible with the decision-maker’s preferences. By using this novel method, the authors succeeded in finding results that avoided a complete compensation amongst the factors considered, taking into account ranges that would be of significant importance in the decision process.

Author(s):  
Mousavi Dehmourdi, Seyed Ali ◽  
M. Gopal Naik ◽  
Ravande Kishore

The crisis in construction industry are deemed a negative event in the security, economic, political, materials, or natural affairs, especially when they occur abruptly, with little or no warning; and it has always caused damage, therefore crisis management is necessary to order not turn crisis into a disaster. The present study focuses on exploring the impact of the crisis in construction projects by offering a review of the literature to identify the various associated crisis and made a case study of ‟Khuzestan province (Iran). First, through a questionnaire survey with construction experts as respondents, the initial list of 222 sub-factors were confined to a list of 174 essential crisis sub factors and were grouped under 20 main crisis factors. Second, the shortlisted 174 essential crisis sub factors conduct a questionnaire-based survey with top experts from ‟Khuzestan province (Iran) construction organization as respondents to obtain the Importance of each sub factors based on the rating of its impact the second list and using CRITIC method to weighting crisis factors. Third, ranking the influential sub crisis factors from the all sub factor list and provide a single list without considering the initial list crisis through WASPAS model. Finally, The result of the crisis effects rating, seen that the most crisis effects rating in the Khuzestan construction industry is the economic crisis, followed by the market and real estate, and then insurance, maintenance, after that respectively, logistics, and materials crises. Identify the crisis is the main part of crisis management; the obtained results help construction crisis managers and all stakeholders to achieve sustainable development in construction projects. Identifying and prioritizing construction-specific crises allow sustainable crisis managers to concentrate to be successful projects.


2011 ◽  
Vol 17 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Mohamed Marzouk ◽  
Lobna El-Mesteckawi ◽  
Moheeb El-Said

Contract relationships in construction projects in Egypt have become increasingly strained in recent years. Working relationships, communications, and contractual commitments are often not carried out in good faith. Hence, adversarial approaches to public and private sectors of the construction industry in Egypt generate a substantial increase in the use of binding arbitration and the judicial system for the settlement of contractual disagreements. In this research, a survey questionnaire was designed to obtain the relative weights of the factors that influence the Dispute Resolution Strategy (DRS) Decision. Twenty six combinations of project situations were established based on ten factors, established after studying the causes of disputes with the aid of literature and unstructured interviews, which affect the DRS-Decision. Experts were asked to perform pair-wise comparisons for the ten factors and advise on the recommended resolution methodology for the different status of DRS-Decision's factors. Although negotiation is usually the first attempt to solving any dispute, it sometimes could waste time and consequently money without reaching a satisfying solution. A computer model is proposed to inform the user of whether to quit negotiation and/or any amicable solution to save time and money and resort to arbitration/litigation instead, or to stick to negotiation and/or any amicable solution as it's the only way by which the dispute could be resolved. Results obtained from the survey were utilized in the development of the computer model to provide a simple and an easy to use tool that could advise decision makers on the most appropriate dispute resolution strategy that would mostly succeed; save time and money. A case study is presented to validate the computer model and demonstrate its use. Santrauka Statybos dalyvių santykiai statybos projektuose pastaruoju metu tampa labai įtempti. Dažnai darbiniai santykiai, komunikacija ir sutartiniai įsipareigojimai nėra vykdomi sąžiningai. Todėl priešiški požiūriai į statybos pramonės viešąjį ir privatųjį sektorius Egipte sukelia reikšmingą teisinių ginčų sistemų ir arbitražo taikymo didėjimą. Šiame tyrime, siekiant nustatyti santykinį veiksnių, lemiančių ginčų sprendimo strategijos (GSS) sprendimo santykinį reikšmingumą, buvo sudaryta tyrimo anketa. Remiantis dešimčia veiksnių, kurie daro poveikį GSS sprendimams ir buvo nustatyti remiantis literatūros bei nestruktūrizuotais pokalbiais studijuojant ginčų priežastis, buvo sudaryti dvidešimt šeši projektų situacijų deriniai. Ekspertų buvo prašoma atlikti dešimties veiksnių porinį lyginimą ir pasirinkti ginčo sprendimo metodologiją esant skirtingoms GSS sprendimų veiksnių reikšmėms. Nors derybos, kaip įprasta, yra pirmasis bandymas spręsti bet kokį ginčą, kartais tai gali būti tik laiko ir lėšų švaistymas nepasiekiant norimo rezultato. Pasiūlytas kompiuterinis modelis, kuris gali informuoti naudotoją, ar verta siekiant taupyti laiką ir pinigus nutraukti derybas ir (arba) kitą taikų procesą, vietoj to pradėti teismo arba arbitražo procesą, ar tęsti derybas ir (arba) taikų procesą kaip vienintelį būdą išspręsti ginčą. Remiantis tyrimo rezultatais buvo sukurtas paprastai naudojamas kompiuterinis modelis, kuris sprendimų priėmėjui gali patarti, kokią ginčo sprendimo strategiją reikėtų pasirinkti, kuri iš jų yra sėkmingiausia, taupo laiką ir pinigus. Siekiant parodyti kompiuterinio modelio veikimą pateikta atvejo analizė.


2021 ◽  
Vol 37 (04) ◽  
pp. 433-443
Author(s):  
Wajid Alim ◽  
Sabahat Nisar ◽  
Rabia Asif

The spread of COVID-19 has obstructed construction projects worldwide owing to disruptions in supply chain, restriction on the combine work and legislative enforcements. Construction projects from developing economies are more susceptible to these challenges. The aim of this research is to identify factors caused by COVID-19 impacting progress of construction projects and review tools to lessen its negative impact. Multistep methodology is adopted using semi-structured interviews with construction experts to identify factors affected the progress during COVID-19; and data collection from professionals to quantify the significance of each identified factor; Cronbach’s alpha for reliability and multiple regression to assess the effect of COVID-19 on progress of construction projects. The findings show that COVID-19 has left severe issues at the operational and financial levels. The remedies use to correct these issues will help policymakers from construction industry to improve existing strategic plans and develop new policies to manage the issues caused by COVID-19.


Neutron ◽  
2022 ◽  
Vol 21 (2) ◽  
pp. 52-59
Author(s):  
Liliana Hannes ◽  
Julistyana Tistogondo

Accelerating infrastructure development in Indonesia is a good thing, but this is not without problems. The COVID-19 pandemic is a problem that has a large and global impact, not least in Indonesia, especially in the construction industry sector. The construction project of the Soedono Madiun Hospital is one of the construction projects that have experienced the direct impact of the COVID-19 pandemic. Therefore, the purpose of this study is to review and analyze the impact of the covid-19 pandemic on construction projects in the case study of the construction project of the Soedono Madiun Hospital, and to find out the biggest impact of the covid-19 pandemic which has the most influence on construction projects in the case study of the construction project of the Soedono Hospital. Madison. The research method used to determine the biggest impact of the covid-19 pandemic on the cost and time aspects is the multiple linear regression analysis method with the help of Microsoft Excel. The other data analysis methods used in this study were the validity and reliability tests used in testing the questionnaire. The results of data analysis conducted in this study indicate that there are seven independent variables affect the dependent variable, namely the suitability of planning and project realization with the equation y= 94.186-0.376x1-0.108x2-1.014x3+0.873x4 for the time aspect, and the equation y=87,009 -0.0006x5-0.001x6-0.0002x7 for the cost aspect. With this equation, it can be seen that the independent variable that has the most influence on the dependent variable on the time aspect is the independent variable X3, namely the change in the time schedule due to delays in the arrival of construction materials by 1.014, while in the cost aspect is the independent variable X6, namely changes in costs due to instability. the price of construction materials is 0.001. So, it is hoped that there will be a project management handling that focuses on the most influential variable, namely construction materials.


2015 ◽  
Vol 3 (2) ◽  
pp. 69-84
Author(s):  
Wadhah Amer Hatem ◽  
Samiaah M. Hassen Al-Tmeemy

     Suicide attacks, bombings, explosions became the part of daily life in Iraq. Consequently, the threat of terrorism put the Iraqi construction sector in the face of unique and unusual challenges that not seen on other countries. These challenges can have extensive impact on construction projects. This paper seeks to examine the impact of the terrorist attacks on construction industry and determine the extent to which the impact of terrorism on construction projects in terms of cost, schedule, and quality. This study adapted quantitative and qualitative approaches to collect data using questionnaire survey and interviews, as well as historical data. The study focused on projects that have been the target of terrorist strikes in Diyala governorate. A variety of statistical procedures were employed in data analysis. The results revealed the extent to which terrorist attacks impact construction projects in terms of cost, time, and quality. The results of this study will enhance the awareness of all construction parties to the impact of the terrorist attacks against construction projects. Eventually, this can develop a risk management assessment and assist contractors to properly protect projects and buildings to minimize injuries and fatalities in the event of terrorism.


Author(s):  
Bernard Tuffour Atuahene ◽  
Sittimont Kanjanabootra ◽  
Thayaparan Gajendran

Big data applications consist of i) data collection using big data sources, ii) storing and processing the data, and iii) analysing data to gain insights for creating organisational benefit. The influx of digital technologies and digitization in the construction process includes big data as one newly emerging digital technology adopted in the construction industry. Big data application is in a nascent stage in construction, and there is a need to understand the tangible benefit(s) that big data can offer the construction industry. This study explores the benefits of big data in the construction industry. Using a qualitative case study design, construction professionals in an Australian Construction firm were interviewed. The research highlights that the benefits of big data include reduction of litigation amongst projects stakeholders, enablement of near to real-time communication, and facilitation of effective subcontractor selection. By implication, on a broader scale, these benefits can improve contract management, procurement, and management of construction projects. This study contributes to an ongoing discourse on big data application, and more generally, digitization in the construction industry.


2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Thu Anh Nguyen ◽  
Phong Thanh Nguyen ◽  
Sy Tien Do

The construction industry has played an essential role in the process of modernization and industrialization and it has also been a major factor in determining the development of the infrastructure for other economic sectors. Construction companies consider the measurement of work progress, which often wastes time and has a low resolution, to be one of the most challenging problems faced by project management. Therefore, this research aimed to propose practical solutions by applying recent technological achievements of the 4.0 industrial revolution to improve the efficiency of the quantity management process. By utilizing the advantages and features of a BIM model and 3D laser scanning, this paper proposes that adopting a BIM model and 3D laser scanning has the potential to improve the accuracy and efficiency of the quantity management process. The case study demonstrated some typical tasks to evaluate accuracy and efficiency as well as to showcase the research proposal.


2021 ◽  
Vol 2042 (1) ◽  
pp. 012116
Author(s):  
Pierson Clotilde ◽  
Soto Magán Victoria Eugenia ◽  
Aarts Mariëlle ◽  
Andersen Marilyne

Abstract Recent developments in the lighting research field have demonstrated the importance of a proper exposure to light to mediate several of our behavioral and physiological responses. However, we spend nowadays around 90% of our time indoors with an often quite limited access to bright daylight. To be able to anticipate how much the built environment actually influences our light exposure, and how much it may ultimately impact our health, well-being, and productivity, new computational tools are needed. In this paper, we present a first attempt at a simulation workflow that integrates a spectral simulation tool with a light-driven prediction model of alertness. The goal is to optimize the effects of light on building occupants, by informing the decision makers about the impact of different design choices. The workflow is applied to a case study to provide an example of what learnings can be expected from it.


Author(s):  
Nagwan El- Sayed Abo El- Enen, Khaled Mohamed Heiza, Ibrahim Nagwan El- Sayed Abo El- Enen, Khaled Mohamed Heiza, Ibrahim

Due to recent environmental and Political requirements, and regulations of the construction industry, in which bridges is one of its important category, deciding its proper constructability is becoming vital. Therefor the objective of this research is to develop a decision model for selecting proper constructability of green bridges constructions, the model was built based on analytical network process (the ANP) soft were program, integrated with value engineering approach. For this analytical study different parameters are identified and ranked to be implemented for the decision model developed on the biases of four surveying studies conducted in this study the results of these surveying's was be analyzed by using the statically analytical program; "SPSS". Model validation and reliability is carried out using the analytical network process (ANP) for statistically analysis using case study which is a cable bridge project constructed in Egypt. ANP proves to be an effective framework for assessing readiness to adopt and facilitating TQM. The result of the study illustrate that the proper constructability alternative in green bridge concept for this determinate project is the concrete box girder type, upon this there is a cost loss of $3, 500 per square meter, equivalent to 50% losses, respect to the life cycle cost this is due to did not using the best alternate of the estimated project. upon the possibility of applying this decision model to such studies of infrastructure projects, and with respect to the results gained; it is recommend to apply the ANP model with respect to VE procedures to bridges projects of all kinds and their determinants, as well as all other construction projects, especially national ones, in future studies, which allows decision- makers to make decisions that aim at the highest quality without any waste in unnecessary costs.


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