Developing a time-cost trading-off model for construction projects in fuzzy environment (case study: weigh in motion system)

2018 ◽  
Vol 10 (3) ◽  
pp. 183 ◽  
Author(s):  
Solmaz Salehzadeh ◽  
Abbas Mahmoudabadi
Author(s):  
Mazurina Mohd Ali ◽  
Sakinah Zahra Norman ◽  
Erlane K. Ghani ◽  
Noor Hasniza Haron

Risk Management is recognized as an important exercise that creates value to a project and improves project performance. Time, cost and quality are the primary measures of a project performance in this industry. The success or failure in any construction project can be monitored through the attainment of these primary measures. Notably, Malaysian construction industry is considered as one of the important industries that positively contribute to the increase of Gross Domestic Product and subsequently the growth of the country’s economic development. Unfortunately, this industry suffers poor performance in which it leads to failure in accomplishing effective time, cost and quality performance. Most construction projects face a schedule delay, cost overrun and are poor in product quality. Thus, the aim of this study is to determine the influence of risk management on construction project performance of Malaysian companies based on these three primary measures. The degree of diffusion of risk management practice in the chosen construction project in Malaysia is also examined. The methodological approach exploited in this study is a case study approach involving analysis of documented data and face-to-face interviews with key players that hold different roles and responsibilities. They include a director, project managers, finance managers, contract managers and quantity surveyor managers. The results demonstrate that adopting effective risk management practices positively impacts project performance thus leading to project success. Nevertheless, the lack of knowledge and poor communication of risk management practices in construction projects contribute to the weak implementation of an effective and systematic risk management practices in Malaysia.


Author(s):  
Ashish Sharma

Abstract: In every construction project, the time and cost are the two most important objectives/factors to be considered. Clients and contractors should strive to optimize the project time and cost to maximize the return. Resources are also one of the major constraints of the construction projects. In recent years, several studies have been conducted to optimize the time and cost of project under constraint conditions of resources. Since most studies assume the time and cost as deterministic parameters, uncertainties should be considered in estimating the time and cost of the project's activities when minimizing the duration and cost of the project. For this purpose, this paper embeds the fuzzy logic to handle the uncertainties in estimating the time and cost. Besides, the multi-objective genetic algorithm (MOGA) is used to develop the resourceconstrained time-cost trade-off model. Alpha-cut approach is utilized to define the accepted risk level of decision maker. The efficiency of the proposed model is demonstrated through solvinga case study project of highway construction. The results of case study project provide a set of Pareto-optimal solutions. The developed model encourage the decision making process by choosing specified risk levels and utilizing the related Pareto-front. Keywords: Construction projects, time-cost trade-off, uncertainties, fuzzy logic, MOGA,Pareto-optimal solution.


2019 ◽  
Vol 9 (1) ◽  
pp. 44-63 ◽  
Author(s):  
Marimuthu Kannimuthu ◽  
Benny Raphael ◽  
Ekambaram Palaneeswaran ◽  
Ananthanarayanan Kuppuswamy

Purpose The purpose of this paper is to develop a framework to optimize time, cost and quality in a multi-mode resource-constrained project scheduling environment. Design/methodology/approach A case study approach identified the activity execution modes in building construction projects in India to support multi-mode resource-constrained project scheduling. The data required to compute time, cost and quality of each activity are compiled from real construction projects. A binary integer-programming model has been developed to perform multi-objective optimization and identify Pareto optimal solutions. The RR-PARETO3 algorithm was used to identify the best compromise trade-off solutions. The effectiveness of the proposed framework is demonstrated through sample case study projects. Findings Results show that good compromise solutions are obtained through multi-objective optimization of time, cost and quality. Research limitations/implications Case study data sets were collected only from eight building construction projects in India. Practical implications It is feasible to adopt multi-objective optimization in practical construction projects using time, cost and quality as the objectives; Pareto surfaces help to quantify relationships among time, cost and quality. It is shown that cost can be reduced by increasing the duration, and quality can be improved only by increasing the cost. Originality/value The use of different activity execution modes compiled from multiple projects in optimization is illustrated, and good compromise solutions for the multi-mode resource-constrained project scheduling problems using multi-objective optimization are identified.


Author(s):  
Mazurina Mohd Ali ◽  
Sakinah Zahra Norman ◽  
Erlane K. Ghani ◽  
Noor Hasniza Haron

Risk Management is recognized as an important exercise that creates value to a project and improves project performance. Time, cost and quality are the primary measures of a project performance in this industry. The success or failure in any construction project can be monitored through the attainment of these primary measures. Notably, Malaysian construction industry is considered as one of the important industries that positively contribute to the increase of Gross Domestic Product and subsequently the growth of the country’s economic development. Unfortunately, this industry suffers poor performance in which it leads to failure in accomplishing effective time, cost and quality performance. Most construction projects face a schedule delay, cost overrun and are poor in product quality. Thus, the aim of this study is to determine the influence of risk management on construction project performance of Malaysian companies based on these three primary measures. The degree of diffusion of risk management practice in the chosen construction project in Malaysia is also examined. The methodological approach exploited in this study is a case study approach involving analysis of documented data and face-to-face interviews with key players that hold different roles and responsibilities. They include a director, project managers, finance managers, contract managers and quantity surveyor managers. The results demonstrate that adopting effective risk management practices positively impacts project performance thus leading to project success. Nevertheless, the lack of knowledge and poor communication of risk management practices in construction projects contribute to the weak implementation of an effective and systematic risk management practices in Malaysia.


Author(s):  
Mohammad Hasan Senan ◽  
Nadine Alzaghrini ◽  
Issam Srour

Dispute occurrence on construction projects is almost inevitable. If not addressed adequately, disputes can cause contract termination and loss of benefits for all parties involved. Among various dispute resolution methods, mediation is gaining popularity in the construction industry as it satisfies the desired degree of control of both parties among other factors (e.g., time, cost). Mediation is a cooperative problem-solving method that benefits from the expertise of a neutral third party known as the mediator. Well-defined tactics such as creating trust atmosphere, tackling the core of dispute, and using advanced integrative approach for solution determination are essential to reduce the gap between disputants and ensure effective discussions. The aim of this paper is two-fold. First, it investigates common mediator tactics and relates them to the likelihood of having a successful mediation. The San-Ramos Channel case study is used to illustrate the efficiency of mediator tactics. Second, this paper takes a closer look into the use of mediation in Lebanon as an example of a country with minimal regulations on mediation. Barriers for an effective implementation of mediation such as the role and the influence of the engineer on the construction process and the mediator’s lack of technical expertise are discussed and recommendations are derived.


2016 ◽  
Vol 9 (3) ◽  
pp. 202-213 ◽  
Author(s):  
Abu N.M. Faruk ◽  
Wenting Liu ◽  
Sang Ick Lee ◽  
Bhaven Naik ◽  
Dar Hao Chen ◽  
...  

2018 ◽  
Vol 10 (12) ◽  
pp. 4772 ◽  
Author(s):  
Basem Khatib ◽  
Yap Poh ◽  
Ahmed El-Shafie

Delays in construction projects are a common phenomenon throughout the industry. This problem has many negative impacts on the time, cost, and sustainability of the projects. Many studies were conducted to identify the main causes of this delay in new construction projects in different regions but very few studies have focused on finding an explanation for the causes of delay in major reconstruction projects that have great religious and cultural sustainability. This paper examines the factors that contributed to work delays in one of the most major reconstruction projects that took place recently in the Middle East, which is namely the Mataf Expansion Project in the city of Mecca, Saudi Arabia. Fourteen interviews were conducted with project managers, construction managers, and senior site engineers to identify the factors that they encountered and led to the delay in the reconstruction activities of this project. Some of the findings were consistent and similar to most other causes of delay that are associated with new construction projects. However, interestingly, this research has discovered the existence of other unavoidable factors that caused a delay and should be considered for any similar reconstruction projects. The results showed that these factors could be divided into two groups: the first one is related to the demolition phase (five factors) and the second group is related to construction works (nine factors). In addition, it has been observed that the building material during the reconstruction is considered one of the major delaying factors. Finally, these 14 delay factors should be carefully considered to assure the sustainability of the main object’s function during the reconstruction activities.


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