The propellant production on Mars needs to be completed within a tight timeframe given by the mission scenario. There are several mission scenarios under consideration, which are all depending on the transfer trajectories between Mars and Earth . The base calculation for this study will use the time of a Hohmann-transfer 𝑡 , which takes approximately 258 days . This is the time from start on earth to arrival on Mars and thus the minimum time between the confirmed start-up of a propellant production plant on Mars and the arrival of a manned mission. The fuel capacity of the Starship by SpaceX is used as reference for the production scenario with 240 t of CH4 and a total capacity of 1.200 t (fuel and oxidizer).