Optimizing the modularization of floor plans in modular construction projects

This paper presents an optimization model that enables construction planners to generate and analyze optimal tradeoffs between minimizing the total cost of modular construction projects and maximizing the functional performance of the floor plan. The model is developed in three main stages that are designed to formulate the model decision variables, objective function, and relevant constraints; implement the optimization computations using linear programming; and evaluate the model performance using a case study of a modular construction project of an office building. The results of the case study highlight the original contributions of the model to theory and its impact on practice. First, the model contributions to theory include its novel capabilities of quantifying the impact of room widths and lengths on the total modular construction cost and floor plan functional performance, identifying an optimal width and length for each room in modular construction projects from a range of feasible alternatives, and generating optimal tradeoffs between the two conflicting objectives of minimizing modular construction cost and maximizing floor plan performance. Second, the results of the case study highlight the impact of the model on practice and its ability to provide planners with much-needed support in optimizing the layout of modular construction projects in order to maximize floor plan functional performance while minimizing the total modular construction cost including its fabrication, transportation, assembly, and structural frame costs.