Short fiber reinforced thermoplastics are used extensively due to their high mechanical properties and low processing costs. Long fiber reinforced thermoplastics (LFRT) show an even more interesting property profile and are used more and more often for structural parts. However, processing is not that simple and their anisotropic properties resulting from the fiber microstructure pose a challenge in terms of engineering design process. To reliably predict the structural mechanical properties of LFRT, it is necessary to investigate a method that allows comprehensive consideration of the existing fiber microstructure within the engineering design process. For this purpose, a micromechanical approach developed at IKT has been extended to include the necessary process variables and the associated models.