[eng] In this thesis I will study one of the Higgs boson production channels, the so-called vector-boson fusion process (VBF). This is the production channel with second largest total rate. I will first present the state-of-the-art computation of the total cross-section for this process, which is currently known up to the second order (next-to-next-to-leading order) in QCD and up to the first in the weak interactions perturbation theory. Residual theoretical uncertainties are reduced at the 2-3% level. After this, I will turn to study more exclusive observables in VBF applying typical experimental cuts. The simulation for such observables includes the next-to-leading order QCD corrections, and is matched with parton-shower Monte Carlos. This makes it possible to have accurate predictions together with a realistic description of the final state in terms of hadrons.