There are several methods and strategies for production planning which are effectively implemented in the metal industry and in the automobile and machine tools industry in particular. However, small research has been published regarding scheduling in foundry operations. Therefore, the main aim of this paper is to develop a new mathematical model for scheduling foundry operations based on JIT (Just in Time) perception. The research strategy includes a review of available literature and combination of the developed mathematical model into a foundry for testing the model with true data. The planned model is successfully implemented into the ERP (Enterprise Resource Planning). The conclusions presented in this paper are based on the results of the tests carried out in the single foundry.