Swissgrid commissioned a meta-study, which aimed at examining and summarising current findings on 'characteristics of over head lines and underground cabling'. This was a first step towards creating a scientifically sound basis which reflects state-of-the-art science and technology and which allows for an overview at a factually neutral level. The Technical University of Ilmenau conducted the study. In addition, Swissgrid set up an Advisory Study Council representing all stakeholder groups in Switzerland. The Council evaluated the study findings, and confirmed their comprehensiveness.