Simulation is often used in the field of vehicle routing and scheduling to verify strategic or tactical optimisation results at an operational level. Through simulation it is examined how routes would have taken place in the past, if an optimised tactic or strategy had been used. By comparing the results of simulation with the results from real-world operations, conclusions can be drawn about the quality of the new tactics or strategies. The simulations are done using historical data, but often also using adjusted historical data (e.g., changed quantities or changes in the temporal bases).