The customer approached us with a request for the custom production of a high-precision component based on provided drawing documentation and a 3D STEP model. The objective was to ensure high geometric and dimensional accuracy for a part intended as a critical component of a technological assembly. In custom production, it is vital that every part adheres strictly to technical specifications and is ready for immediate deployment without further modifications. The first step was the technological preparation of production, which included an analysis of the provided documentation, definition of tolerances, and optimization of manufacturing parameters. Based on the STEP model and the technical drawing, precise CNC milling procedures were established, including the selection of appropriate tooling, cutting conditions, and clamping solutions. The goal was to minimize any deviations and ensure that the final component met not only nominal dimensions but also the required form accuracy and surface finish quality. The actual manufacturing was carried out on modern CNC milling machines capable of high-precision custom production. CNC technology guarantees adherence to dimensional tolerances and repeatability—critical even for single-part orders where maximum precision is expected. Throughout the milling process, every surface, bore, and geometric detail was processed exactly according to the STEP model and drawing documentation. Upon completion of the CNC production, the customer requested an inspection of the contoured surfaces to verify the part's conformity with the original data. For this purpose, the component was scanned and measured using a professional Hexagon Romer Absolute Arm equipped with a tactile probe. This system enables 3D measurement and geometric inspection with high precision, making it ideal for verifying critical surfaces and functional zones of the part. The measurement resulted in a detailed verification of selected contoured surfaces, allowing for a direct comparison with the original 3D STEP model. This comparison confirmed that the component met all technical specifications and that both dimensional accuracy and form tolerances were maintained. This process provides the customer with the assurance that the part is fully functional and ready for deployment without further adjustments. This approach combines custom CNC production, precise technological preparation, and 3D inspection using the Hexagon Romer Absolute Arm, ensuring high quality for individual parts even in small batches. Furthermore, the use of 3D measurement allows for rapid identification of deviations and minimizes the risk of manufacturing errors, which is crucial for precision components. The entire project demonstrates that the combination of modern CNC milling technologies and precision 3D measurement is an effective solution for the production and inspection of custom parts. The result is a high-precision component, fully compliant with the provided model, ready for immediate operational use and meeting all customer requirements