Every day, trucks arrive at our loading bay in Frauenfeld in order to deliver goods. On especially busy days, it is like a beehive. The components mainly come from our own production facilities or from external suppli-ers for further machining or assembly. In the course of a year, far more than 10,000 items are delivered.
Our quality assurance starts with the inspection of incoming goods for all components and assemblies which are delivered. Specially trained employees inspect the components according to defined random sample testing plans. The components are only released for further use if the inspection of random samples does not show any faults or deviations. Commercial parts are visually inspected. In case of a change of supplier and new samples we fully inspect all of the dimensions and functions. An initial sample report for these is archived.
The incoming goods department is equipped with a wide range of mechanical and optical testing and measuring equipment. With this, all of the measurements can be carried out with the required precision. Among other things, plug gauges are used to quickly check internal diameters; a profile projector or a microscope is used to assess machining residues in (transverse) holes; a CNC 3D measuring machine for high precision and complex optical and tactile meas-urement, vast quantities of thread gauges or ring gauges for measuring threads; a spring measuring device for tension and compression springs, as well as a roughness depth measuring device.
To ensure that no errors can creep in, our employees are regularly trained in the use of the measuring equipment, either in-house or directly by the manufacturer. All testing and measuring equipment is registered in a data-base for the specific location and is subjected to regular monitoring.
The relevant technical drawings, as well as the other applicable SERTO factory standards form the basis for inspection of incom-ing goods. From these, we derive a testing plan for the specific components, which forms the basis for the incoming goods inspection. The number of random samples and the test equipment which is to be used are also clearly specified.
The colleagues generate a complaint report for each faulty delivery. The reports are saved in a database and are used for as-sessment of the supplier. In the form of a «division of power» our Technical Manager decides whether the delivery is to be rejected, reworked or is given special approval subject to conditions. Faulty products are stored in an inaccessible quarantine store and are thus protected from unauthorised access.