Targets as defined at the beginning of the feasibility1. Identify the best-suited climate-friendly alternative gas mixture for 145kV GISa. Dielectric properties (BIL, AC)b. Permeationc. Liquefactiond. Temperature risee. Estimation on necessary pressure vessel improvementsf. Back part switchingg. Other material properties and compatibilities2. Elaborate the technical and economic potential of aluminium-welded pressure vessels3. Define the basic architectural properties for the alternative GIS products (pressure coordination, flange diameters, compensation concept, phase change concept, service concept)4. Concept for integration of vacuum interrupter units and consequences5. Define the optimum variance at module (and E-part?) level for the building kit 6. Identify a cost-efficient type test strategy for all SWAG3 products7. Identify prerequisites for manufacturing, routine testing, packing and transport, installation and commissioning, maintenance and service with a focus on cost efficient solutions8. Prepare for maximum GVS usagea. Material translation lists for various standardsb. Exclusion of exotic materialsc. Early SQM involvement9. Establish and execute a continuous product cost tracking processa. World projects for 4 products, for 3 locations, SBB/DBBb. DI4 and >=DI2 BOMs10. Establish and execute a continuous risk management