The wholesale price index (WPI) is based on the wholesale price of a few relevant commodities of over 240 commodities available. The commodities chosen for the calculation are based on their importance in the region and the point of time the WPI is employed. For example, in India about 435 items were used for calculating the WPI in base year 1993-94 while the advanced base year 2011-12 uses 697 items. Currently the base year has been revised from 2004-05 to 2011-12 by the Office of Economic Advisor(OEA), Department for promotion of industry and internal trade Ministry of Commerce and Industry to align it with the base year of other macro economic indicators