Scheduling Optimization of Prefabricated Components Production under Multi-resource Constraints with Resource Reallocation
Prefabricated component(PC),as an important part of assembled construction,its production cost directly affects the cost of the entire building.Amortization costs of PC can be effectively reduced by scheduling production.In this paper,a production scheduling model under multi-resource constraints is established for the problem of imperfect production scheduling model of existing PC.The developed model contains six processes and six resource constraints for PC production,with minimizing the completion time and minimizing the delay penalty as the optimization objectives,respectively.An optimization method based on the immune genetic algorithm is designed to optimally solve this scheduling model.The six productive resources are categorized into reallocable and non-reallocable resources based on their allocability.Based on the optimization results,further optimization of completion times and delay penalties is achieved through the reallocation of production resources.The experimental results show that the two-stage scheduling optimization can effectively improve the production efficiency and avoid delayed delivery.
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