The index measures the monthly evolution of the volume of industrial production (excluding construction). With effect from January 2013 the indices are calculated with reference to the base year 2010 using the Ateco 2007 classification (Italian edition of Nace Rev. 2).
In September 2017 the seasonally adjusted industrial production index decreased by 1.3% compared with the previous month. The percentage change of the average of the last three months with respect to the previous three months was +1.5.
The calendar adjusted industrial production index increased by 2.4% compared with September 2016 (calendar working days being 21 versus 22 days in September 2016); in the period January-September 2017 the percentage change was +2.9 compared with the same period of 2016.
The unadjusted industrial production index decreased by 0.8% compared with September 2016.