Radiative Corrections in the Standard Model and Their R??le for Precision Tests of the Electroweak Theory

We present a detailed description of the on-shell electroweak radiative corrections calculation together with a list of formulae for 4-fermion processes complete at the one-loop level and with the accuracy required for precision experiments at the e+e− colliders LEP and SLC. Applications are discussed to the mass interdependence of the weak vector bosons, the weak mixing angle, and to the precisely measurable on-resonance observables Z mass, width, forward-backward and polarization asymmetries for leptonic and hadronic final states. Comparisons with the results of other calculations have been performed as far as possible with satisfactory agreement in the predictions for the measurable quantities.