Zou, X; Zhang, L and Zhang, Q (2022) Time-cost optimization in repetitive project scheduling with limited resources. Engineering, Construction and Architectural Management, 29(2), pp. 669-701. ISSN 0969-9988
Abstract
Purpose: The purpose of this research is to develop a time-cost optimization model to schedule repetitive projects while considering limited resource availability. Design/methodology/approach: The model is based on the constraint programming (CP) framework; it integrates multiple scheduling characteristics of repetitive activities such as continuous or fragmented execution, atypical activities and coexistence of different modes in an activity. To improve project performance while avoiding inefficient hiring and firing conditions, the strategy of bidirectional acceleration is presented and implemented, which requires keeping regular changes in the execution modes between successive subactivities in the same activity. Findings: Two case studies involving a real residential building construction project and a hotel refurbishing project are used to demonstrate the application of the proposed model based on four different scenarios. The results show that (1) the CP model has great advantages in terms of solving speed and solution quality than its equivalent mathematical model, (2) higher project performance can be obtained compared to using previously developed models and (3) the model can be easily replicated or even modified to enable multicrew implementation. Originality/value: The original contribution of this research is presenting a novel CP-based repetitive scheduling optimization model to solve the multimode resource-constrained time-cost tradeoff problem of repetitive projects. The model has the capability of minimizing the project total cost that is composed of direct costs, indirect costs, early completion incentives and late completion penalties.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | acceleration strategy; constraint programming; repetitive projects; resource constraints; time-cost tradeoffs |
| Index terms: | resource constraint, methodology, construction project, tradeoff, strategy, penalty, scheduling, mathematical model, cost optimization, repetitive scheduling, acceleration, implementation, project performance, hotel, constraint programming, case study, direct cost, indirect cost, residential building, repetitive project |
| Subjects: | decision analysis, project controls, cost management, regulatory law, economics, research methods, algorithms, management, project management theory and practice, production management, operations research, operations management, contractual arrangements, mathematical modelling, construction type, data collection methods |
| Topics: | Project Management, Research Practice, Business Strategy, Cost Management, Procurement, Construction Technology, Risk Management, Legal Issues, Digital Applications, Time Control |
| Descriptive scope: | 5 PCTEA |
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