• Type of survey: annual structural survey.
  • Population scope: the population under study is the set of industrial establishments with more than 10 paid employed persons whose main activity is included in sections B, C or D of the National Classification of Economic Activities (CNAE-2009).
  • Geographical scope: the entire national territory.
  • Reference period: the calendar year.
  • Sample size: around 8,000 units.
  • Type of sampling: stratified sampling. A systematic sampling with random start is applied within each stratum.
  • Collection method: questionnaire completed by the respondent (internet/paper).

Methodology documents, questionnaires, classifications...