Good foundation

1. At a Glance

• The Index of Industrial Production (IIP) is India's main monthly measure of how much industry is producing. Its base year was changed from 2011-12 to 2022-23, and the new series came out on 1 June 2026 [1][2].
• The editorial "Good foundation" (The Hindu, 1 Oct 2026) says strong IIP growth in FY 2026-27 sets the economy up well for the festive season [6].
• Why it matters for UPSC: Prelims asks about base years, sector weights and which body publishes which index (IIP vs Index of Core Industries, ICI). Mains GS-III asks about growth, industrial policy and the quality of official statistics.
• The new series lines up with other indicators. MoSPI chose 2022-23 so that the IIP base year matches GDP and WPI [1][2]. The new GDP and CPI series were also scheduled for 2026 [5].

2. Why in the News

• IIP growth rose to 8% in August 2026. This is the second-fastest rate since April 2024, the earliest month with growth data in the new series [6].
• The fastest month in this period was June 2026, at 8.8% [6].
• IIP growth for April–August FY 2026-27 was 6.8%, faster than the same period in each of the previous two years [6].
• IIP and ICI trends now largely agree. In the old series the two indices often pointed in opposite directions [6].
• Earlier data point: IIP growth was 5.1% in May 2026 [4].

3. Background & Evolution

• The old IIP series used base year 2011-12. It was replaced by the 2022-23 series [1][2].
• Why 2022-23: a base year should be a fairly stable economic period and should match the base years of GDP and WPI [1][2].
• The base revision was part of a wider statistical overhaul. MoSPI scheduled the new CPI series for 12 Feb 2026, the new GDP series for 27 Feb 2026, and the new IIP for May 2026 [5].
• The new IIP was released on 1 June 2026, and PIB issued a "First Press Release" for the series [1].
• New-series growth figures start from April 2024 [6].

4. Core Static Facts

Parameter	Old series	New series	Source
Base year	2011-12	2022-23	[1][2]
Compiling body	—	MoSPI	[1][2]
Launch of new series	—	1 June 2026	[1]
Number of item groups	407	463	[1][2]
New item groups added	—	120	[1][2]
Mining & Quarrying weight	14.372%	11.053%	[1][2]
Manufacturing weight	77.633%	76.062%	[1][2]
Electricity (& Gas Supply) weight	7.995%	10.865%	[1][2]
Water Supply, Sewerage & Waste Mgmt	Not covered	2.020% (new sector)	[1][2]
Release lag	—	28 days after the reference month	[1][2]
Data portal	—	e-Sankhyiki (MoSPI)	[3]

• Wider coverage: the new series adds Gas Supply, Water Supply, Sewerage and Waste Management [1][2].
• Mining now includes minor minerals and rare earth minerals as well as major minerals [1][2].
• Examples of new items: magnetic-stripe cards (debit/credit), CCTV cameras, non-woven textile articles, parts of aircraft and spacecraft, stents, and non-veterinary vaccines [1][2].
• Index of Core Industries (ICI): the other official index of industrial performance. It covers sectors such as electricity and cement [6].

5. Multi-Dimensional Analysis

Economic

• Broad-based growth. In August 2026, electricity grew 12.3% (IIP), and construction goods grew 6.4%, down from 8% in July [6].
• Construction activity looks strong. The ICI shows cement growing 12.5% in August 2026, just below 12.7% in July [6].
• Festive-season demand on top of this industrial momentum should help consumption-led growth in Q3 of FY 2026-27 [6].

Scientific / Methodological

• The weights now reflect a changed economy. Electricity & Gas has risen from about 8% to about 10.9%, and mining has fallen from about 14.4% to about 11.1% [1][2].
• The new items track newer industries, such as aerospace parts, medical devices (stents), vaccines and CCTV electronics [1][2].
• Better methodology and more data sources make the new IIP "as accurate an indication of industrial growth as government data can provide" [6].

Governance / Statistical Credibility

• IIP–ICI alignment helps credibility. Electricity growth was 12.3% (IIP) vs 11.6% (ICI) in August 2026. The old series often gave contradictory signals [6].
• Common base years across GDP, WPI and IIP make it easier to compare data across indicators [1][2][5].

Environmental / Urban

• Water supply, sewerage and waste management are now counted as industrial output (2.02% weight). This makes urban services and circular-economy activity visible in the index [1][2].

6. Recent Developments (last 12-18 months)

• Feb 2026: release dates set for the new CPI (12 Feb), new GDP (27 Feb) and new IIP (May 2026) [5].
• 1 Jun 2026: new IIP series (base 2022-23) released [1][2].
• May 2026 data: IIP growth of 5.1% [4].
• June 2026 data: IIP growth of 8.8%, the fastest since April 2024 [6].
• August 2026 data: IIP growth of 8%. Electricity grew 12.3% (IIP) and cement grew 12.5% (ICI) [6].
• 1 Oct 2026: The Hindu editorial "Good foundation" (p. 6, Chennai edition) calls the trend a good base for festive demand [6].

7. Prelims Hooks

• New IIP base year: 2022-23, replacing 2011-12 [1].
• New IIP series released: 1 June 2026 [1][2].
• Compiled and released by: MoSPI [1][2].
• Item groups: up from 407 to 463 in the new series [1][2].
• New item groups added: 120 [1][2].
• Manufacturing weight: 76.062%, still the largest sector [1][2].
• Electricity & Gas Supply weight: rose to 10.865% [1][2].
• Mining & Quarrying weight: fell to 11.053% [1][2].
• New sector added: Water Supply, Sewerage & Waste Management, at 2.020% [1][2].
• Mining coverage: now includes minor minerals and rare earth minerals [1][2].
• Release lag: IIP comes out monthly, 28 days after the reference month [1][2].
• Data portal: IIP data is on MoSPI's e-Sankhyiki portal [3].
• Base year logic: 2022-23 was chosen to match the GDP and WPI base years [1][2].
• August 2026 IIP growth: 8%. June 2026 was 8.8%. April–August FY27 was 6.8% [6].

8. Why 8% Growth Cannot Be Compared With Old IIP Headlines

• The new series shows faster growth than the old one, for the same year
• For 2023-24, the new series (base 2022-23) shows IIP growth of 6.7%. The old series (base 2011-12) showed 5.9% for the same year [7].
• Factories did not produce more. Only the method of measuring changed.

• So you cannot put 8% in August 2026 next to an old-series number from 2019 and say growth has sped up. The two figures measure different baskets with different weights.

• "Second-fastest since April 2024" covers a short period

• Growth figures in the new series begin only in April 2024 [6]. So "second-fastest" is a ranking among about 29 months, not a long-run record.

• MoSPI has joined old and new data only at the sector level, using a linking factor (a ratio that converts old index values to the new scale) [2]. There is no linked series for each item.

• No seasonally adjusted IIP exists yet

• Seasonal adjustment removes regular calendar effects, such as monsoon slowdowns or festival rushes, so you can see the real trend.
• MoSPI says this needs "a sufficiently long and stable time series". It will come only when enough years of data exist [2].

• So a jump in one month may partly be the season, not new strength. The editorial's festive-season argument should be read with this in mind [6].

• Electricity now pulls the headline up more than before

• Electricity & Gas now has a weight of 10.865%, up from 7.995% [1][2].
• Electricity grew 12.3% in August 2026 [6]. A fast-growing sector with a bigger weight lifts the total more than it did in the old series.
• To judge whether industry is really broad-based, look at manufacturing (76% weight) on its own.

9. Why a 14-Year-Old Base Kept Counting Kerosene and CFLs

• The IIP uses fixed weights, so it ages every year
• The IIP is built with the Laspeyres formula. This means every item keeps the weight it had in the base year, month after month [2].

• When an industry shrinks or a new one grows, the index does not notice until the base year is changed.

• The gap between revisions has grown longer

• Earlier bases were 1993-94, 2004-05 and 2011-12 [2]. The 2011-12 base stayed in use until June 2026 [1].
• For those years the index kept giving weight to items that were dying out. The new series drops 64 item groups, including kerosene, fluorescent tubes and CFLs, sewing machines and printing machinery [2].

• Over the same years it missed products that were growing. 120 item groups had to be added, such as stents, vaccines and CCTV cameras [2].

• Some new products were hidden inside "n.e.c." before

• n.e.c. means "not elsewhere classified", the miscellaneous box in the product list (NPCMS 2011) [2].
• The old series removed these items and spread their output over other items. MoSPI itself admits this could under-count "niche or innovation-driven" manufacturing and give extra weight to some minor items [2].

• This time, field officers went back to the factories to find out what the n.e.c. products actually were [2].

• The fix already exists but is on hold

• A chain-linked index updates weights often, for example every year, so it does not go out of date between revisions.
• The Technical Advisory Committee (TAC-IIP) has recommended a method for it. But it will be compiled only internally for now, and a pilot will be released "only after observing their stability" [2].

10. What the New Index Still Cannot See

• Manufacturing is chosen from factory survey data
• The manufacturing basket and its weights come from the Annual Survey of Industries (ASI), 2021-22 and 2022-23 [2].

• Items are picked until they cover at least 80% of output value in each industry group. A small product that is not in the basket is not counted, however fast it grows [2].

• Missing factories are filled in by estimate

• If a factory does not report for under 6 months, its output is imputed, meaning estimated using a formula from the TAC-IIP [2].
• If a factory stops reporting for longer or shuts down, another factory is substituted [2].

• This keeps the index running. But when many factories go silent, part of the monthly number is an estimate, not reported output.

• The water sector counts connections, not service

• Water supply is measured by the number of tap connections. Sewerage is counted through connections reported in 500 AMRUT cities [2].
• A connection is counted even if little water flows through it. Sewerage in towns outside AMRUT is left out.

• So this 2.02% sector shows how much infrastructure has been built, not whether services are actually delivered [1][2].

• Real growth depends on the price index used

• Some items are recorded in rupees, not in tonnes or units. To remove the price rise, MoSPI divides by the Wholesale Price Index (WPI), which is used as the deflator [2].
• If WPI shows less price rise than those producers actually charged, real growth looks higher than it is. The reverse is also true.
• MoSPI plans to move to an Output Producer Price Index (prices producers actually receive), but only after it has proved stable [2].

11. What MoSPI Should Do Next, and Who Acts

• NSO/MoSPI: release the chain-linked pilot on a fixed timeline

• TAC-IIP has already recommended the method [2]. A deadline for the pilot would stop weights going 14 years out of date again.

• NSO/MoSPI: publish a seasonally adjusted series with a clear start date

• Without it, users cannot tell a festive-season jump from a real change in trend [2][6].

• NSO/MoSPI: publish linked history for sub-sectors, not just sectors

• The linking factor is released only at the sector level [2]. Researchers cannot compare manufacturing sub-groups over the long run.

• The 6.7% vs 5.9% gap for 2023-24 shows how much the method alone can change the story [7].

• MoHUA, with MoSPI: widen and deepen the water-sector data

• Sewerage data now comes only from 500 AMRUT cities [2]. Extending it to other towns, and recording water actually supplied, would make the new sector show real service.

• MoSPI: switch the deflator to Output PPI once it is tested

• This matches the plan in MoSPI's own FAQ [2]. It would make "real" growth for value-based items more accurate.

12. Anchors for Answers

• Data: IIP growth for 2023-24 is 6.7% on the new 2022-23 base vs 5.9% on the old base, so the same year looks different under a new method [7]
• Data: 120 item groups added and 64 dropped (e.g., kerosene, CFLs, sewing machines), which shows how out of date the 2011-12 basket had become [2]
• Data: 10th base revision of the IIP. Earlier bases include 1993-94, 2004-05 and 2011-12 [2]
• Report/Committee: Technical Advisory Committee on base year revision of All India IIP (TAC-IIP), report released 25 May 2026. It recommended chain-linked indices, but only as an internal pilot for now [2]
• Scheme: AMRUT, whose 500 cities supply the sewerage-connection data for the new Water Supply, Sewerage & Waste Management sector [2]

13. Mains Relevance

• GS-III: Indian Economy — planning, mobilisation of resources, growth, development; industrial policy and its effect on industrial growth; infrastructure (energy, cement/construction).
• GS-II (secondary): government policies and institutions, in this case the statistical system (MoSPI) and data governance.
• Possible question stems: 1. The revision of the base year of IIP to 2022-23 goes beyond a technical exercise. Discuss how changes in coverage and weights improve the measurement of India's industrial economy. (250 words) 2. Reliable, internally consistent macro-data is a precondition for sound economic policy. Examine this in light of India's recent revision of GDP, CPI and IIP series. (250 words) 3. Recent industrial growth has been led by electricity and construction-related sectors. Assess whether this growth is sustainable and broad-based. (150 words)

14. Related Topics to Study Next

• Index of Eight Core Industries (ICI): the companion index that the article compares with the IIP [6].
• New GDP series (2026): the base years are aligned, so you need both to read the growth story [5].
• New CPI series (Feb 2026): needed to understand inflation and real growth together [5].
• Wholesale Price Index (WPI): the base-year alignment was one reason for picking 2022-23 [1][2].
• PLI schemes / Make in India: shape which new manufacturing items (e.g., electronics, medical devices) appear in the index.
• Sectoral analysis of the power sector: electricity is the fastest-growing IIP sector and now has a larger weight [1][6].
• Circular economy / waste management: the newly added IIP sector [1][2].

15. Common Errors / Trap Areas

• Wrong base year. The new IIP base is 2022-23, not 2011-12 or 2020-21 [1].
• Confusing IIP with ICI. They are different indices. The IIP is compiled by MoSPI [1]. The ICI is a separate index covering core sectors (e.g., cement, electricity) [6]. The ICI's publisher did not appear in the sources retrieved; check it separately.
• Assuming electricity has the largest weight. Manufacturing (76.062%) is still the largest by far. Electricity's weight rose to 10.865% but is below mining (11.053%) [1][2].
• Missing the new sector. Water Supply, Sewerage & Waste Management is new in the 2022-23 series [1][2].
• Mixing up item-group numbers. "120" is the number of new item groups added. "463" is the total [1][2].