The performance of 2-ply modified bitumen in asphalt is influenced by several key process parameters. These include the type and amount of polymer used for modification, the temperature during mixing, and the shear rate applied. Additionally, the duration of mixing and the cooling rate post-mixing can affect the homogeneity and properties of the modified bitumen. Proper control of these parameters ensures optimal adhesion, elasticity, and resistance to aging and deformation in the final asphalt product.