A systemic approach allows to see the production enterprise as a complex system of production and auxiliary facilities. In the process approach, it is manufacturing that makes the stream of materials flow through individual production cells in a mixed (serial – parallel) system, in a discreet way (in steps). Processing times are different at each stage. The element that connects the individual production facilities is buffer storage, which functions as a storage site for semi-finished goods departing from facility N or a delivery warehouse for the next site (N + 1) or to another station. The steps’ parameters depend on the processing time and batch size. The analyzed plant consists of 9 stations and buffers (warehouses). The process of manufacturing the refrigerating appliance has a cellular layout. An important part of production is the proper scheduling of production of the necessary components and assembly, so that the time of realization of the production task is as low as possible.