In operation, it becomes clear how a facade performs under real conditions. Condition, ageing, maintenance and observed issues indicate which questions may need closer investigation. Depending on the task, monitoring, a targeted technical investigation or a broader condition assessment may be appropriate. The right method depends on the question and the information available.

Priedemann structures the technical question, assesses available information and observations, and identifies possible causes or information gaps. The findings support decisions about maintenance, repair, operational adjustment or further investigation. Where requirements change fundamentally, they may also provide a starting point for revitalisation.