Flow shop optimization of hybrid make-to-order and make-to-stock in precast concrete component production

As the world environment is faced with the severe challenge of global warming, prefabricated construction is the path for the construction industry towards green production. Precast component manufacturers produce standardized and non-standardized components simultaneously. Non-standard components are produced make-to-order (MTO). Standard components are produced make-to-stock (MTS). In this study, the flow shop precast component production scheduling problem under a hybrid MTO-MTS environment is studied. A hybrid MTO-MTS precast component flow shop production model is developed. The object is to minimize total tardiness and earliness of delivery. An iterative job insertion algorithm based on whale optimization is developed. The proposed method involves two stages: scheduling and insertion. The first is to optimize the scheduling of customized MTO components. Then the standard MTS job is inserted. Through the computational evaluation, the performance and effect of the proposed approach are tested. It can conclude that the proposed algorithm contributes to the effective and efficient optimization of Hybrid MTO-MTS precast component production. (c) 2021 Elsevier Ltd. All rights reserved.