A Mathematical Model for Double Layer Precast Production Scheduling

This paper involves a precast production with double layer in identical parallel molds. The precast production consists of 5 processes to be produced sequentially. Each process requires a specific resource that must be shared among molds except the curing process which does not require any resources. There are 5 concrete formulas for considering that do not effect on the precast quality. Nevertheless, each formula results in different costs and different processing time. The more expensive formula requires the shorter processing time. We propose an MIP model to select formulas and schedule all jobs to finish within due date.