When simulation results should be used for decision support in time-critical emergency scenarios, a trade-off between minimizing the simulation time and maximizing the accuracy of the modeled scenario has to be made. Both factors have a significant influence on the degree of accuracy in the results. In this paper, we describe a simulation set-up for a time-efficient analysis of a common satellite link by extending a given raytracing simulation with a socalled Pre-Evaluation (PE). It is well known that every surface of an obstacle within a raytracing simulator increases the necessary computing-time of the scenario. The novel process chain starts with the PE, which gives an estimation for the minimal necessary degree of accuracy in modeling, depending on the maximum acceptable simulation error. Therefore, the PE evaluates the influence on radio waves for all obstacles in the receiver's ambience. Afterwards only those models need to be integrated in the analysis, which have a significant effect on the radio propagation. This leads to an optimized simualtion processing and to an increase of the usability of the simulation.