Achieving the required dimensional accuracy in the final product is a primary objective of all manufacturing processes, including metal forming operations, especially in industries such as automotive, aerospace, and household appliances. Among the most critical issues affecting product quality are springback after the removal of forming forces and thickness thinning due to plastic deformation. These factors pose major challenges in producing components with diverse geometries using various metal forming techniques, such as deep drawing and incremental sheet forming (ISF). Accordingly, this study conducts a numerical simulation using the Finite Element Method (FEM) via Abaqus/CAE to predict the behavior of sheet metal in terms of springback and thickness variation under both deep drawing and incremental forming processes. The goal is to assess and compare the performance of each method on the same product design to determine their strengths and limitations, and to propose the most suitable forming method based on industrial application needs. The final comparison results clearly indicate that deep drawing is preferable when maintaining material thickness is critical, whereas incremental forming is more suitable when dimensional accuracy (reduced deviation from target dimensions) is a higher priority................. Keywords:........... Springback, Thickness Thinning, Deep Drawing, Incremental Sheet Forming.