The electrification of public transport brings fundamental change to vehicles, infrastructure and operations. Choosing the right technologies determines how economical, reliable and sustainable a system will be over decades. With a sound fleet strategy, we connect technical possibilities with real operating conditions. We take timetables, rotations, route profiles as well as climate and topography into account to precisely assess ranges, charging times and availability. At the same time, we analyse investment and operating costs in detail so that decisions are not only ecologically but also financially sustainable. The result is a clear foundation that provides companies with guidance, minimises risks and secures long-term competitiveness.