Annual

EACEI 2015 was collected via the internet and possibly by post (at the request of the establishment).

The collection period extended from January to May 2016 (main sample) and from September to December 2016 (complementary sample).

Local unit (of an enterprise)

The sampling frame is the Sirus directory (directory of statistical units).
The sampling method is a stratified plan by NTE (a nomenclature of activities dedicated to energy consumption), workforce bands, and region.
Allocations are optimised on the NTE x workforce bands, and on net energy consumption, taking into account the average dispersion per stratum over the last 3 years. The allowances are exhaustive above the threshold of 250 employees and for strata of less than 10 units.

The 2015 edition of the EACEI was exceptionally supplemented by an additional sample of 5,493 establishments, bringing the complete sample to 13,990 units.

• Checks during the collection phase: checks on internal coherence and temporal coherence in the form of an alert at the time of data entry;
• Follow-ups during the collection phase: exhaustive reminders by mail on non-respondents, priority telephone reminders on large non-respondents;
• Data cleaning to ensure consistency of answers within each questionnaire;
• Calculation of precision indicators.

See file "Méthodologie de l'enquête annuelle sur les consommations d'énergie dans l'industrie (EACEI)".

See file "Valeurs modifiées" which indicates the percentages of total modified values, as well as by division of the NAF, by staff bracket and by region.