The main indicator to measure the effectiveness of our approach to maintenance management is the “energy-based technical availability”, i.e. the percentage of time, on an annual basis, when the turbine is ready to produce and conditions are suitable for production: we started the in sourcing process in in late 2016, we can boast an increase of 2% in this indicator if compared with the past when third-party companies were tasked with the maintenance, its value being 98%.