A foundry workshop is a complex technical system, the functioning of which is determined by a significant number of heterogeneous subsystems, elements and parameters. The effective functioning of technological systems of this type is possible only if the operation of its elements and subsystems is synchronized. The goal of the work is to solve the problem of synchronizing the work of the subsystems of a foundry workshop, depending on its production and technological structure, the range of castings produced and technical requirements for them, the type of technical characteristics and reliability of equipment, and the quality of work of the repair and restoration service. The mathematical model of the functioning of the foundry shop was created on the basis of the synthesis of ideas from the theory of units, the theory of mass service systems and the mathematical apparatus of simulation modeling. When developing a mathematical model for synchronizing the operation of subsystems of a foundry workshop, an aggregate-event approach was used; the model in this case consists of interacting units that implement individual operations of the technological process. The modeling of the process of functioning of the entire system of units is implemented using a control program that determines their interaction in accordance with the sequence of execution of technological operations and the selected strategy for servicing applications for liquid metal. An algorithm has been developed and implemented to solve the problem of synchronizing the work of subsystems of a foundry workshop according to the criterion of the quantity and quality of castings produced.