The objective of this work package is to support ESO in commissioning VLTI instruments. The first VLTI instrument to coherently combine the light from two telescopes is VINCI. NEVEC provides support to ESO in active commissioning of VINCI at Paranal, in software development to process and analyze VINCI data. Finally NEVEC is involved in the data analysis (technical and scientific) of VINCI data in order to improve the performances of the VLTI.
