This Request for Information (RFI) describes the services required to provide Engineering Services for the Versatile Diagnostic Automatic Test Station (VDATS) testers, National Stock Numbers (NSNs) 49... This Request for Information (RFI) describes the services required to provide Engineering Services for the Versatile Diagnostic Automatic Test Station (VDATS) testers, National Stock Numbers (NSNs) 4920-01-553-0693, 4920-01-553-1534, 4920-01-663-3117KV and 4920-01-663-3118KV. These services include obsolescence monitoring and forecasting.