Quantity Decision Support Model for Mid-to-high-rise Modular Construction Projects

Abstract

Modular construction can improve construction quality and accuracy through manufacturing process, and it allows massive production and cost savings by repeatedly producing the same unit. In particular, it is possible to shorten the time because the on-site work and the manufacturing can be carried out at the same time. However, according to the modular construction project survey report, there is no significant difference in the average construction period of modular construction and conventional construction. This is due to schedule delay problems that occur in the progression on-site work. Therefore, it is necessary to select alternatives to prevent schedule delay during on-site construction progressing. Especially, in case of large-scale modular construction project, module assembly on site is performed simultaneously with manufacturing in factory. Identification of alternatives should be done at the same time, taking into account both the manufacturing and the on-site work. In this study, the management factors of large-scale modular construction project were identified through the IDEF0 modeling, and the factory production amount and the on-site construction amount management model was derived. This will reduce the schedule delay problem that occurs in the progression on-site work of a large scale modular construction.