In this investigation, the transport phenomenon in the cathode side of an enhanced parallel flow field PEMFC was taken into account and optimized. The study procedure contains CFD and RSM for regression and MOPSO, NSGA-II, and TOPSIS for MOO. Features are the porosity of GDL, operating pressure, operating temperature, and the stoichiometric of both sides. Objectives are normalized transport resistance and water saturation at the interface of GDL and the flow field. The obtained results are: