The Reserve Bank of India Governor proposed a Producer Price Index (PPI) on July 17th, 2012 to measure the average change in sale prices of domestic goods and services. A PPI is needed because the Wholesale Price Index does not capture price movements in services and the Consumer Price Index only measures retail price changes and lacks sufficient historical data. Unlike the CPI, the PPI measures price changes from the perspective of the seller. It is important to adopt PPI methodology for inflation measurement since seller and buyer prices differ due to factors like taxes and distribution costs.