The Ministry of Statistics and Programme Implementation (MoSPI) is revising the Index of Industrial Production (IIP), including methodologies and data sources, after consulting with experts and stakeholders. Traditionally, the IIP uses a fixed-base Laspeyres framework, which does not account for production shifts. To address this, MoSPI has prepared Discussion Paper 2.0, proposing a chain-based methodology for the IIP to allow for annual weight adjustments. MoSPI invites views and comments from experts and stakeholders on the proposed methodology. The Discussion Paper is available on the MoSPI website www.mospi.gov.in, and comments can be sent to iipcso[at]nic[dot]in by January 25th, 2026. The release date is January 13th, 2026.
Key Entities Referenced
Index of Industrial Production (IIP): A key economic indicator measuring changes in the volume of industrial production.
Ministry of Statistics and Programme Implementation (MoSPI): The primary ministry responsible for the compilation and revision of the Index of Industrial Production.
Discussion Paper 2.0: Adoption of Chain-Based Index of Industrial Production (IIP): A document outlining the proposed methodology for adopting a chain-based approach to the IIP calculation.
Ministry of Statistics & Programme Implementation
Release of Discussion Paper 2.0: Adoption of
Chain-Based Index of Industrial Production (IIP)
प्रव तथ: 13 JAN 2026 5:47PM by PIB Delhi
The Ministry of Statistics and Programme Implementation (MoSPI) is undertaking the base revision
exercise of the Index of Industrial Production (IIP). In the process, MoSPI is revisiting methodologies,
exploring new data sources and incorporating changes after comprehensive consultations with the experts,
academicians, users and other stakeholders.
Traditionally, the IIP has been compiled using a fixed-base Laspeyres framework, in which sectoral and
industry weights remain unchanged until a base-year revision. However, with production shifts in
response to demand, technology, and policy changes, some industries expand, while others decline or
disappear, and entirely new industries or production lines within an industry emerge. Therefore, fixed
weights become progressively less relevant and thus affects the efficacy of the indices. The chain-based
method of compilation of IIP offers better accuracy by capturing these changes by allowing the increase
and decrease in weights annually to correctly reflect a more recent production structure.
To facilitate stakeholder engagement on this topic, MoSPI has prepared a Discussion Paper 2.0: Adoption
of Chain-Based Index of Industrial Production (IIP) which outlines the proposed methodology for chain-
linked indices. MoSPI invites views and comments from experts, academicians, Central government
Ministries/ departments, State governments, financial institutions and other stakeholders on the proposed
methodology.
The Discussion Paper is available on the MoSPI website www.mospi.gov.in. Comments and suggestions
may be sent to iipcso[at]nic[dot]in by 25th January, 2026.
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