The index of core industries is released by the Office of Economic Adviser, Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry.
The Index of Eight Core Industries has the base: 2011-12.
The Eight Core Industries comprise 40.27 % of the weight of items included in the Index of Industrial Production (IIP).
The Index of Eight Core Industries is a monthly production index, which is also considered as a lead indicator of the monthly industrial performance.
ICI measures combined and individual performance of production in selected eight core industries in which Petroleum Refinery Products has the highest and the fertilizers have the lowest weightage.