Amorphous silicon PV technology transfer is carried out by a transnational consortium consisting of one industry (NAPS France) and seven research institutes and university laboratories. One of the strong features of OASIS is the involvement of an actual industry giving the opportunity to implement new developments in an industrial environment. The project aims at improving the EC industrial competitiveness regarding module production. A thorough assessment of the production process is a prerequisite for later implementations. Outdoor degradation tests and characterizations of degraded and non-degraded modules have been performed. From characterizations of separate layers and interfaces it was concluded that the TCO and window p-layer as well as the TCO/p interlace are not optimal.