The same revision policy is applied to STS data released nationally and transmitted to Eurostat.

All revisions are taken into account.

Routine revisions are mainly due to available additional information, especially overdue respondents at the survey.

Then SA-WDA data are also revised each month as a consequence of the new calculation of SA-WDA coefficients. These revisions are taken into account each month.

Major revisions are mainly due to rebasing, new weights or update of productivity factors.

No revision calendar exists.

Routine revisions are explained in the national publication. There is a dedicated paragraph entitled “revision of variations”.

Warnings are published in the national publication "Informations Rapides" and on the web site www.insee.fr when the revisions are major (revisions like after rebasing or changes in methodology).

Generally, initial and final values are close, there are few revisions.

In the whole industry, the mean revision between january 2021 and december 2023 is -0.27 point for the year-on-year growth rate of the calendar adjusted serie (see Figure below).

In the whole industry, the mean absolute revision between january 2021 and december 2023 is 0.62 point for the year-on-year growth rate of the calendar adjusted serie (see Figure below).

These revisions include the impacts of rebasing or major methodological change.

Revisions in the whole industry (sections B to E) between january 2021 and december 2023 (36 months)

MR = -0.27 and MAR = 0.62

Annual rebasing process

The 2015 rebasing implemented an important innovation with the introduction of annually chained indices instead of fixed-weights indices. In addition, since the implementation of the new basis 2015 in March 2018, the industrial production indices (IPI) are now reviewed at the rate of one seventh of the series each year. The aim of this annual update is to improve the relevance of the IPI with regards to the evolution of technologies and production processes, by adapting the way of measuring a product, by including emerging products or, on the contrary, removing old products. Each year, the annual review is implemented with the publication of March concerning the indices of January. The adjusted series are backward-reviewed. At an aggregated level, the revisions on indices are moderate. Nethertheless, some indices can be significantly revised resulting from an improving coverage or a modification of the measurement variable (for instance production sold in euros instead of quantities).