A simple multiple objective linear programming model on customization manufacturing for metal steel making effectiveness

Metal steel making currently faces the trend of customization and batch production resulting in difficulties of cost control. This study develops a simple multiple objective linear programming (MOLP) method to formulate a manufacturing decision model with cost minimization for steel making procedures. Operations data collected from manufacturing procedures were accordingly transferred into the model and therefore manufacturing decisions can be made. Cost factors considered in the model were materials, outsourcing, manufacturing, and manpower. To make the model more applicable, costs related to rework and overtime were also included. In consideration of energy consumption, the proposed model was formulated as minimizing two objectives of total cost and energy use.