In complex systems there's the need of the flexibility to modify and maintain the system by an interface more human-readable than programing code, like editing tables where the behavior of the system is defined. This allows both a quicker editing and the possibility to let the configuration and maintenance of the system to non programmers, like business/tariff analysts. This flexibility comes at the cost of a heavier computational time. The support for "code external" textual configuration of both rating cases-amounts and the algorithmic rating process steps, is sometimes called "Rule-based Rating". Rule-based rating is one simple example of the use of the more general control table technique.