Multiobjective Model for Optimizing the Planning of Floor Plans, Finishing Level, and Transportation in Modular Construction

The objective of this research study is to formulate and develop an automated multiobjective optimization model for modular construction projects. The model is designed to support planners of modular construction in generating optimal floor plan designs that minimize the total cost of modular construction projects while maximizing their floor plan functional performance. A case study of a modular construction project was analyzed to highlight the use of the model and demonstrate its capabilities. The results of the case study analysis illustrate the original contributions of the model in automating the generation of optimal trade-offs between the two aforementioned important objectives of modular construction projects by optimizing the holistic impact of floor plan modularization, module finishing level, and module transportation planning decisions. The results also confirm the novel capabilities of the model in identifying for each prefabricated module an optimal (1) width and length; (2) finishing level; and (3) truck assignment, delivery day, and location and orientation on the assigned truck. (C) 2022 American Society of Civil Engineers.