Dependent validations 
During dependent validations, registers in a relationship are validated together. You can use the following types of dependent validations:
Control meter validation (fixed value against relative value)
The system checks whether the total consumption of the settlement registers matches the consumption of the control register.
Serial switching validation
The system checks whether the total consumption of secondary installations exceeds the consumption of the primary register.
Cosine phi validation
The cosine phi is calculated from reactive/active registers.
In validation 04, the system checks whether values fall below a lower limit defined in Customizing.
In validation 05 (check against cosine phi of previous period), the system compares the cosine phi of the current and previous period(s).
Consumption ratio validations (fixed value and previous period)
The system creates a ratio for the consumption of registers in a register relationship. The system then checks whether the ratio matches either the fixed value or the consumption ratio of the previous period.