Diagnosis
The system has to be able to derive the aggregation level from thecalculation object of the condition. When aggregation is at the level ofbuilding and land, this means that only rental objects, buildingsor land are allowed as calculation objects. When aggregation is at thelevel of the business entity, then business entities are alsoallowed as calculation objects. When aggregation is at the level of thepooled space, then only pooled spaces and rental spaces areallowed as calculation objects.