1. An aircraft customization system comprising: a number of processors: at least one memory; an aircraft option database comprising engineering options that have been previously certified and are related to selectable options for an aircraft, the selectable options associated with a model, a version, and a zone, the selectable options selected from at least one of a galley, an attendant seat, a lavatory, a passenger seat, a landing gear, and an engine, wherein an engineering option in the engineering options is a pre-certified design in which the design for the engineering options is put through a process to obtain certification that the engineering option meets a group of regulations promulgated by an aviation administration pertaining to airworthiness of the pre-certified design in the aircraft, the engineering options including at least one three-dimensional model; an aircraft configurator coupled to the aircraft option database and configured to receive a selected option of the selected options for the aircraft and identify a number of engineering options that have been previously certified from the engineering options in the aircraft option database for the selected option, to reuse said design that have been previously certified; a verifier configured to ensure that all components needed for the aircraft are pre-certified components, based on designs selected by a product manager, which is configured to reuse designs that have been previously certified; and a configuration generator coupled to the aircraft configurator and configured to generate a final design reusing previously generated designs including the number of engineering options associated with resources comprising at least one of physical attachment points, utilities, data and other suitable resources, in which the final design is used to build the selected option in the aircraft with the number of engineering options that have been previously certified and were identified in the aircraft option database by the aircraft configurator for the selected option, wherein the configuration generator generates documents needed to manufacture the aircraft which include a bill of materials.