A Multi-Objective Mathematical Programming Model for Project-Scheduling Optimization Considering Customer Satisfaction in Construction Projects

Abstract

The aim of this study was to develop a multi-objective mathematical programming model for the trade-off of time, cost, and quality in the project-scheduling problem (PSP) by taking priorities and resource constraints as well as activity preemption into account. First, a small-sized problem instance that was a sub-project of an oil and gas construction project was used for te validation of the proposed model and algorithm. Subsequently, considering the sensitivity, complexity, and importance of oil and gas projects, the proposed model was implemented in a large-sized oil and gas construction project. Considering the NP-hardness of this problem, the NSGA-II metaheuristic algorithm was used to deal with the time, cost, and quality trade-off problem. Finally, a sensitivity analysis was implemented on the three main parameters of time, cost, and quality to investigate the effects of changes on the results. The findings show that the proposed model is more sensitive to cost changes, so an increase in project costs leads to a drastic change in the values of other objective functions.

Identification and Ranking of Factors Affecting the Delay Risk of High-Rise Construction Projects Using AHP and VIKOR Methods

“…This comprehensive data, sourced from the municipality of the Mashhad City Council in Iran [34], sheds light on the critical factors contributing to project delays. The findings underscore that the primary challenges leading to these delays result in increased project costs, a notable reduction in overall project effectiveness, a significant decline in the quality of work, the necessity for additional budget allocation, expenses incurred for compensating delays, the potential for customer dissatisfaction, delayed utilization of project-generated income, and the crucial aspect of a timely return on the investment [35][36][37][38]. These factors collectively highlight the complex dynamics influencing project timelines and underscore the need for strategic interventions to enhance project management and mitigate the impacts of these delays.…”

Early Career Project Managers: Well-being and Life Satisfaction Analysis

“…This trend is also seen in project-oriented companies. As a result, stakeholders are more involved in these companies' management and decision-making processes [29][30][31][32]. It's important to note the shift in managers' approach to human resources towards sustainable human resource management [33,34].…”