Paralel makinelerde sıra bağımlı kurulum süreleri ve belirsiz arızaları olan gürbüz çizelgeleme

In this study, machine scheduling activities in the plastic injection production facility of a company competing in electronic sector is investigated. The company designs the products and picks order from customers for these products. There is a frozen production period for the end-product production schedule and all materials to be used in the end-product are expected to be prepared before the production. Otherwise, tardiness of materials leads to penalty costs due to production disruptions and revisions in the frozen plan. There are parallel machines in the plastic injection production facility. Setup time is job and sequence dependent. Furthermore, there are random machine breakdowns in the plastic injection machines. A production schedule that considers sequence-dependent setups, uncertain machine breakdowns is developed with the objective of minimizing tardiness. The solution for the proposed mixed integer quadratic programming formulation provides a robust schedule, which takes possible effects of worst-case scenarios for machine breakdowns into account. Keywords: parallel machine scheduling; sequence-dependent setup times; uncertain machine breakdown; robust scheduling