Maintaining HR Master Data
You can change existing infotypes and create new infotype records for employees. You create a history of data changes and developments during the period that an employee works at an company.
The Change function enables you to correct an existing record without creating a new one. You overwrite the old one. When an infotype record is changed, its history is not updated.
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The Delete function allows you to delete existing infotype records from the database. If you delete infotype records with time constraint 1, the previous record is automatically extended. An infotype history is created using the definition of the validity period.
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Deleting a Previous RecordThe Create function allows you to enter new data. A new record is created while retaining the old record. The infotype history is generated by defining the validity periods.
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The Copy function also creates new infotype records, and as a result, the infotype history is updated. Here, unlike the Create function, data is not entered on an empty screen, but on a screen containing the current data. You can then overwrite these values.
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If you make changes to an infotype record that affects a second infotype record, i.e. changes must be made to the second infotype record, the system will automatically offer you this infotype for maintenance. These are known as dynamic actions which are automatically triggered by the system and not by the user as is the case for personnel actions.
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You can set up your own dynamic actions in the standard settings to deal with situations like this. 
In some cases, changes to an employee’s payroll-related master data can trigger a retroactive accounting run.
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Maintaining Payroll-Related Master Data