42 Design, development and maintenance of computer software for the generation, collection, transmission, evaluation [analysis], preparation and processing of measurement data as well as for communication with measuring systems and rolling mills; certification (quality control); testing, authentication and quality control; quality inspection of building materials; quality control of semi-finished products; process monitoring for quality assurance; services of an engineer, chemist and physicist in metalworking and in the planning, construction, installation, commissioning and repair of rolling mill- smelter plants or their parts