The Ministry of Statistics and Programme Implementation (MoSPI) has undertaken comprehensive methodological revisions of India's key macroeconomic indicators to ensure they reflect the current economic structure and meet emerging data requirements. The base year for Gross Domestic Product (GDP) has been revised from 2011–12 to 2022–23 based on recommendations from the Advisory Committee on National Accounts Statistics (ACNAS). Simultaneously, the All India Index of Industrial Production (IIP) base year has been revised from 2011–12 to 2022–23 under the guidance of the Technical Advisory Committee on IIP, while the Consumer Price Index (CPI) base year has been updated from 2012=100 to 2024=100 guided by an Expert Group.
These revisions incorporate significant methodological improvements including updated data sources, expanded coverage, revised item baskets and weights, and improved estimation methodologies. The updates enhance the use of administrative data sources such as GST and the Ministry of Corporate Affairs (MCA) database, while improving estimation of the unincorporated sector using the Annual Survey of Unincorporated Sector Enterprises (ASUSE) and the Periodic Labour Force Survey (PLFS). The changes also adopt internationally accepted statistical practices and follow technical consultations with experts, academicians, State Governments, and other stakeholders, including pre-release consultative workshops.
MoSPI has modernized National Sample Surveys through digital initiatives including Computer Assisted Personal Interview (CAPI) and the e-SIGMA system, which incorporate in-built validation checks, real-time data monitoring, AI-enabled chatbots, and multilingual interfaces. These improvements have substantially reduced time lags in survey data release from 8-9 months to 45-90 days, with annual survey results now released within 90-120 days, quarterly results within 45-60 days, and monthly results within 15-30 days of survey completion.
Additionally, MoSPI has launched short-duration surveys to cater to emerging needs for high-frequency socio-economic indicators and modified sampling designs for major surveys by adopting district as the basic stratum, enabling states to generate district-level estimates of key indicators. The ministry continuously reviews statistical standards, concepts, classifications, and survey instruments based on recommendations from the Steering Committee for National Sample Surveys, Technical Advisory Groups, and survey-specific Technical Expert Groups.