It's not CAD, it's company management. It's no use going to the CAD forum. If the electronic drawings are not leaked, it is necessary to have the server to control the computer installation authority and find some professional computer personnel to get them. And I feel that the official drawings of your company should be directly in the technical department. All drawings should be sent from the technical department to the relevant departments such as procurement and production, and each department should receive a set of drawings. In this way, no matter whether the drawings are lost or not, there is a person in charge to replace the drawings, and the time and signatory should be registered. Your production department says it is unreasonable to use three official drawings for production. Production drawings need to be stamped by the production department and sent to the workshop. Only one official drawing of each part of the production can be used for other purposes, and the supplier's drawings cannot be provided. So it is more convenient to send a fax or something.