Quality control is guaranteed both by the activity of the operators during all phases of work and by the QC which operates transversely between acceptance, production and final shipment. The testing department has the function of checking compliance with the tolerances indicated in the drawing as regards the material purchased and the pieces produced. The size of the sample to be checked in acceptance is deduced from the qualification status of the supplier in question and from the LQA (control frequency). As regards the articles produced, all the first pieces of the batches are checked and in addition a further piece of the processing cycle, in order to guarantee correct compliance with the processing cycle. During the work phases, the checks are carried out with the use of measuring and control instruments maintained under the calibration regime and include instruments of simple and safe use such as digital gauges, micrometers and altimeters, go / no-go buffers and templates. customized controls, and the most advanced technology tools available in the testing room. Testing in production: Most of the articles produced internally are linked to a control plan where, based on the criticality of the piece, certain measures are defined on a drawing to be checked on the bench. This method is essential to ensure compliance with the dimensions following the machining phase on the machine tools, so as to be able to act in the event of out of tolerance before the piece is finished. The test room has high quality measuring instruments such as three-dimensional measuring machines DEA implemented with software for the control with 3D mathematical models, profilometer and roughness tester for surface control, calibration bench for the verification and calibration of control instruments. , instruments for the control of the hardness and thickness of surface coatings and a wide range of other traditional control instruments (exclusive of the test equipment which are in addition to those available in production) for bench control including fiber endoscopes optics for visual inspection. All the particular products are checked and recorded within the management system in order to certify their compliance.