Calculation (average) attendance

The calculation of the average attendance is based on a formula which gives “weight” to recent meeting editions (future and past) compared to meeting editions which are “further away”: most recent meeting is the starting point, meetings closest to that (past and/or future) count 10% less, etc.

As the reliability of the average attendance from meetings decreases in time, only the past/future ten years (or, if not available: the past/future ten editions) are taken into consideration.

ICCA tries to list the ‘real’ participants number for each meeting edition:

The attendance figures in our database only reflect the registered delegates for educational sessions. Speakers and/or accompanying persons are not included in this number. They can be mentioned separately in the database but will not be a part of the calculation.

To assess the correct number sometimes is difficult, especially with an exhibition attached that attracts more people separately.