The various damages, causes, and activities listed in a notification are broken down in this group of key figures at the level of the individual codes and code groups. This results in the following key figures:

• Number of damage codes

• Number of cause of damage codes

• Number of activity codes

The damage description refers to the values of the damage or malfunction in the maintenance notification, in other words, to the damage, cause of damage, and activity. These values are identified by particular codes, which in turn are grouped from various views in code groups. The codes ensure that one and the same content is always entered in the same format, and can be usefully evaluated.