at a site/plant level, Direzione Territoriale Nord Est – Area Operativa Trasmissione Firenze (Terna Rete Italia SpA), which was selected on the basis of its activities, its contribution to the performance indicators at a consolidated level and its location, we carried out site visits and walk through procedures during which we met local management and gathered supporting documentation regarding the correct application of the procedures and calculation methods used for the key performance indicators.