The conceptual design is a decisive phase where the simulation teams would like to quickly pre-validate spatial architectures from the physical architecture proposed by the system architects. In order to support them to efficiently achieve this task while meeting various industrial requirements, three approaches were proposed and compared, and finally the last and innovative approach called SAMOS (Spatial Architecture based on Multi-physics and Organization of Systems) is presented and described. The corresponding platform will allow to validate the spatial allocation of components under geometrical and multi-physical constraints, while facilitating the collaboration between the different design actors during the conceptual design.