How can more accurate and efficient planning of heterogeneous transport systems be ensured? This is the question we addressed in the PlaKAT research project. Until now, there was a lack of comparative approaches. In addition, the high complexity of transport systems led to planning insecurity. Therefore, operators often chose suboptimal solutions. To solve this problem, we developed a simulation-based approach. This provides a reasonable system configuration for the transport system already in the early phase of planning. Correspondingly existing boundary conditions are taken into account.