In precision manufacturing, complex surfaces have become a defining feature of many high-end components, including turbine blades, orthopedic implants, medical device assemblies, high-precision molds, and automotive powertrain parts. These components demand extremely tight geometric tolerances, surface continuity, and surface roughness, which traditional 3-axis machining often cannot balance in terms of efficiency and quality. As a result, five-axis machining combined with CAM program optimization has become a critical technology to enhance manufacturing capabilities.