In most German cities and communities the drain systems are currently cleaned ac-cording to the strategy of the fire brigade or in fixed, inflexible intervals (cycle cleaning). In this process existing deposit situations, constructional conditions and the local operational experience of the cleaning personnel are considered appropriately. The consequences of these methods are additional cost which have direct effect on the sewage fees. With regards to communal politics striving for a fee reduction, the available resources (budget, staff, vehicles, equipment, operating materials, etc.) have to be used in a optimized way. Turning away from cycle cleaning and towards optimized sewer cleaning based on demand-oriented cleaning strategy with computing assistance can achieve a significant cost reduction and excessive pipe exposure can be avoided.