Standard Wage Maintenance (Infotype 0052) 
Definition
The wage maintenance amount is calculated by the system and is the difference between the current and guaranteed pay. You enter the guaranteed pay for your employee in the Standard Wage Maintenance infotype (0052),.
Use
You can determine the wage maintenance amount using different reasons and different adjustment types. Please refer to the section
Standard Wage Maintenance.Standard wage maintenance type
The wage maintenance types set up in Customizing are called as subtypes. You can create several wage maintenance types for an employee.
Pay scales
You can either enter data in the Pay Scale Type, Pay Scale Area and Pay Scale Group fields, or you can save them without data. The pay scale group and pay scale level are used for the indirect valuation of wage maintenance wage types and are not required for direct valuation.
Wage types
You can only enter wage types set up for wage maintenance in Customizing. The wage type list can include up to 20 wage types.
Wage types that are included in the total are flagged with an X in the T field.
Wage type valuation
You can either valuate the wage types directly, or they can be indirectly valuated by the system.
For indirect valuations, an infotype record must be created for the employee in the Planned Working Time infotype (0007). If the indirect valuation is only valid until a date that is before the validity end of the record, the system displays an appropriate message. If this is the case, you can enter the date on which indirect valuation should take place again.
Indirectly-valuated wage types are flagged with an I after the amount.

For more information on wage type valuation, refer to the section