We discuss a simulation model used in the analysis of the transport logistics of the Austrian Red Cross rescue organization. The emphasis is on the details of modeling the scheduling of ambulance service. Also, the parameters associated with different criteria for the performance of the system are discussed. Implications of the simulation results on decision making and structuring of the organization show the validity of the model and also give hints on possible improvements of the coordination of transports. The main aim is the discussion of the efficiency of central coordination as compared to decentralized planning.