Abstract: A system for designing the interior configuration of a vehicle, where the vehicle is characterized by a vehicle type. The system includes a data storage unit storing a plurality of predetermined validation criteria. A processing unit is operative to generate an aircraft interior configuration design on a basis of the aircraft type. In response to design instructions received from the system user, the processing unit modifies the aircraft interior configuration design accordingly and performs a validation operation on each design instruction, at least in part on the basis of the contents of the data storage unit.