The audit includes the production process; Technical R & D Department standard components, measuring instruments,technical drawings,tester qualification calibration certificate,raw material qualification supplier record,etc. New system of certification from quality Department,internal and external audit quality report, inspection record, non-conforming product disposal procedure, etc.;And also the purchase invoice provided by the financial department;Purchase contracts from purchase Department;Training records provided by general Management Department; Marketing Department's customer complaint information and a series of TÜV certification related inspection directory.