Surface quality refers to the properties and characteristics of a material's surface, such as roughness, waviness, flatness, and defects. Research in this area focuses on understanding how different manufacturing processes, surface treatments, and environmental factors affect the surface quality of materials and products. The goal of this research is to improve the overall quality, performance, and durability of materials by optimizing their surface properties. This can involve developing new techniques for measuring and evaluating surface quality, as well as developing strategies for controlling and improving surface quality during the manufacturing process. Overall, research in surface quality is important for ensuring the reliability and functionality of a wide range of products and materials in various industries.