In order to perform the intended comparison between the restructured grain supply chain (shuttle train service and terminal elevators) and the old grain supply chain (conventional rail service and country elevators) the following additional simplification is made. We assume that the old system did not include any terminal elevators. We also assume that in the new system all the elevators are terminal elevators. Moreover, we assume that one terminal elevator handles the same volume of grain as three country elevators. Discussion of these assumptions, and their implications on the model results are presented in Section 5.1.