They comply with the European regulation on the production of business statistics (EBS Regulation).

Comparability - over time and CC2. Length of comparable time series for U

Consistency over time is ensured through the use of stable methods. In the event of methodological changes or base revisions, past indices are backcast to ensure comparability over time.

The monthly data are already exhaustive; therefore, the monthly and annual data are perfectly consistent.

Internal consistency is ensured through the aggregation method.