New Delhi, Aug 15 (SocialNews.XYZ) The Centre announced that a nationwide survey will be done to update the country's Wholesale Price Index (WPI), introduce a Producer Price Index (PPI), and revise the Index of Industrial Production (IIP) to the 2022-23 base year. The move aims to make inflation and industrial output measures more representative of today’s manufacturing sector. The WPI tracks price changes of goods at the wholesale level, focussing on bulk transactions between businesses.