The Spacecraft Industries CALS is to introduce a exchanging of interface data, which are applied in the collaborative manufacturing of spacecraft by the space industry. The data is exchanged by way of CALS standard such as Word, Excel, PDF, TIFF and 3D-CAD etc. through the network. Generally, several companies conduct manufacturing of spacecraft simultaneously, for which control documents named ICD (Interface Control Documentation and Drawing) with 3D-CAD are utilized to provide information on interface work.
   The spacecraft of SERVIS Project had been designed applying the CALS technology, and the integration design of spacecraft had been virtually furnished on computers.