The operational state of a facility can be defined via operational rules. The validity of the operational rules for the corresponding operational data is responsible for the compliance of the state. As soon as one or more operational rule do not comply with its definition, the corresponding operational state as well as the state space will be evaluated as invalid.

Assign to every operational state of a state space one value via a so-called Marker-Rule, so that the state indicator can display the corresponding value for the present state at every point of time.