The Fuzzy Time-Cost-Quality-Environment Trade-off Analysis of Resource-Constrained Multi-mode Construction Systems for Large-Scale Hydroelectric Projects

2013 ◽  
pp. 425-438 ◽  
Author(s):  
Huan Zheng
Keyword(s):  
Large Scale ◽  
Time Cost ◽  
Resource Constrained ◽  
Trade Off ◽  
Hydroelectric Projects ◽  
Multi Mode

scholarly journals Discrete time-cost tradeoff model for optimizing multi-mode construction project resource allocation

2015 ◽  
Author(s):  
Shuangshuang Nie ◽  
Jihong Gao
Keyword(s):  
Discrete Time ◽  
Pareto Front ◽  
Optimization Technique ◽  
Time Cost ◽  
Resource Constrained ◽  
Baseline Model ◽  
Resource Leveling ◽  
Project Scheduling Problem ◽  
Resource Cost ◽  
Multi Mode

The resource-constrained project scheduling problem has received broad attentions and was evolved into various sub-problems such as resource-constrained discrete time-cost tradeoff problem. The resource leveling problem was proposed to reduce the resource fluctuation and was always studied independently with RCPSP. This research proposed a new model which integrates the resource leveling problem and resource-constrained time-cost tradeoff problem. The evolutionary multi-objective optimization technique, strength Pareto evolutionary approach II (SPEA II) was applied to calculate the Pareto front of time and cost. The resource leveling measured by the metric, resource release/re-hiring, was converted to resource cost. The analysis of the time complexity of the model showed that the runtime of the algorithm was polynomial times of the number of activities. The results of case testing showed that the model was reasonably accurate in comparison with a proposed baseline model.

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