Articlehybrid2013

Resource Leveling in Line-of-Balance Scheduling

55 citations0/0 files storedComputer-Aided Civil and Infrastructure Engineering

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Resource-Constrained Project Scheduling Construction Project Management and Performance Scheduling and Optimization Algorithms

Abstract

Resource leveling involves minimizing resource fluctuations without changing the completion time of a project. A smooth distribution of resources minimizes logistical problems and results in cost savings. Line-of-balance (LOB) is a resource-based scheduling system that is used in projects that exhibit repetitive characteristics, performs resource allocation as a matter of course, but does not deal with resource leveling. In the past, researchers experienced declines in productivity whenever they leveled resources in different linear scheduling models by adjusting activities’ production rates. The objective of this research is to develop a genetic algorithm-based resource leveling model for LOB schedules that does not impact productivity negatively. This model is based on the “natural rhythm” principle, according to which a crew of optimum size will be able to complete an activity in the most productive way. The “natural rhythm” principle allows shifting the start time of an activity at different units by adjusting the number of crews without changing the duration of the activity in any one unit and without violating the precedence relationships between activities. An LOB schedule is established for a pipeline project and is used to illustrate the proposed resource leveling model. It was observed that the model provides a smoother resource utilization histogram. Performing resource leveling in LOB scheduling without sacrificing productivity is the major contribution of the proposed model.

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References

1999Optimization of Resource Allocation and Leveling Using Genetic Algorithms 1998Scheduling Projects with Repeating Activities 1996Construction Resource Scheduling with Genetic Algorithms 1999GA-Based Multicriteria Optimal Model for Construction Scheduling 1997Scheduling/Cost Optimization and Neural Dynamics Model for Construction 1989Resource Leveling in Construction by Optimization 2004Use of Genetic Algorithms in Resource Scheduling of Construction Projects 1990RPM: Repetitive Project Modeling

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2016Linear scheduling with multiple crews based on line-of-balance and productivity scheduling method with singularity functions 2017Improved Adaptive Harmony Search algorithm for the Resource Leveling Problem with minimal lags 2019A constraint programming approach for scheduling repetitive projects with atypical activities considering soft logic 2022Project Risk in the Context of Construction Schedules—Combined Monte Carlo Simulation and Time at Risk (TaR) Approach: Insights from the Fort Bema Housing Estate Complex 2018Improving workflow and resource usage in construction schedules through location-based management system (LBMS)

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