We also provide value-added services that make it simpler and more cost-effective to do business with Tech Fab. Value-Added Services Tech Fabs value-added services begin with just-in-time manufacturing options, dock-to-dock shipments and blanket purchase order delivery. Our Engineering Service Department has prototyping and CAD/CAM design capabilities. Engineering can also help customers make or modify designs. Our programmers can handle electronic file transfers, on disk or on-line, of blueprints and other design specifications.