Codes ensure that issues can be entered in a standardized way and therefore be evaluated automatically. In Plant Maintenance, codes describe damage and malfunctions, the causes of the damage as well as its maintenance and repair, all of which is entered as technical findings in the plant maintenance history. In Quality Management, codes can be used, for example, to describe defect types, defect locations, defect causes, tasks, characteristic values, and usage decisions. You can use this business function to retrospectively deactivate codes that you have already used in documents. Deactivated codes are no longer available in the input help and can no longer be assigned manually either. However, even after deactivation, the codes and their long texts and assigned documents are still available as selection criteria in reports.