The ICEI, as a precursor index of industrial performance, signals changes in industrial production trends. The survey that gathers the necessary information to the construction of the ICEI is made in conjunction with the Industrial Survey and the Construction Industry Survey. The ICEI – Industrial Sectors displays results from the mining and quarrying, construction and manufacturing industries, as well as their sectors. The publication also makes confidence indexes available for the three company sizes (small, medium and large) and for the five geographic regions of Brazil.