Operations, quality control actions and generalised software ( ) |
Data processing
The provisional quarterly indexes can be revised three times until the final version is released after one year from the reference quarter. Revisions are published in order to include more updated information available between the preliminary and the final release. Revisions are affected by: the availability of more complete and update administrative data and structural data on the survey units, revisions in the Large enterprises survey data, quarterly integrated in the OROS indicators, occasional revisions in the estimation methodology |
| Open tree |
 | Processing data undergoing a revision policy |
| |  | Processing indexes undergoing a revision policy (since 31/03/1996) |
| Processing methods |
| | | Use of seasonal adjustment procedures (since 31/03/1996) |
| |  | Estimate calculation (since 31/03/1996) |
