The change in the baseline for IIP and WPI, currently at 2004-05, is expected to bring in more accuracy in mapping the level of economic activity and calculating other numbers like national accounts.
The Central Statistics Office (CSO) has already changed the base for the country's national accounts, including the gross domestic product (GDP) and the gross value addition (GVA).
CSO Director General G C Manna said the government is proceeding with a target of launching the new set of numbers by April-end.
For long, economists and think-tanks have been pitching for release of new time series of IIP and WPI so that GDP numbers can be based on more accurate and realistic data.
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Manna said, "Already, the committee of secretaries headed by the Cabinet Secretary had a meeting. It was decided that a small group comprising secretaries of statistics and industries headed by the Cabinet Secretary will take a final decision. This meeting will be held on March 14, 2017."
WPI basically indicates the rise in profitability of industries. Similarly, IIP denotes the level of economic activity in different sectors, including manufacturing, mining and power.
IIP also gives a broad outlook on output of various types of goods like basic, consumer and capital ones, which helps in gauging the level of economic progress and investments in the economy.
The second advance estimate was arrived at by factoring in mismatches or the difference between GDP calculated by different methods at Rs 1.18 lakh crore or 1 per cent of the Indian economy. It was Rs 45,407 crore, or 0.4 per cent, of GDP in 2015-16.
The CSO has pegged the GDP growth at 7.1 per cent for the current fiscal in the second advance estimate, the same as the first one released in January this year.
"There is concept of NSS (the National Sample Survey) region. There are about 87 NSS regions which are group of districts. We have suggested the states to group districts," he said.
He clarified that the state sub-CPI will not be used as input for calculation of the national rural, urban and combined retail inflation as these will separate surveys.