Assessing the asset condition according structural and functional criteria is the basis for further maintenance planning activities.

1. ✓Analyses of system functions of water supply and sanitary sewer systems are done on the basis of hydraulic modelling analyses.
   

2. ✓Analyses of structural conditions and condition assessments of sanitary sewer systems are based on TV-inspections.
   

3. ✓Analysis of structural conditions of water distribution systems are normally done indirectly on the basis of the failure documentation and water loss performance indicators.
   

4. ✓Asset condition data are recorded in a data base and accordingly in a digital network cadaster and are thereby available for further planning.