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Connection with External Time Management
Systems 
This function enables time data and external wage types recorded in an external time management system to be transferred to Time Management (PT).
There are two options for connecting to external time management systems:
...
1. Providing SAP Time Management with external time data
In this case, either time durations (such as 8 hours) or time intervals (such as 7:00 a.m. to 4:00 p.m.) are recorded in external systems.
After the
transfer, the data is stored either the
Attendances (2002)
or the
Absences (2001)
infotypes.
2. Providing SAP Time Management with external time wage types
After the transfer, the data is stored in the EE Remuneration Info infotype (2010).

If your employees enter their attendance times themselves at time recording terminals (clock-in and clock-out entry), you can then transfer this data (entry times) to SAP Time Management (PT) via the standardized interface HR-PDC.
For more information, see
Connection
with External Time Management Systems.

By transferring time data, you benefit from the full functionality provided by the SAP Time Management component. For example, you can process quota accrual and quota deduction. Then, in Payroll, the employee’s personal work schedule is taken into consideration, ensuring that the appropriate time management data is accessed in order for employee absences to be correctly valuated.

In addition to these two variants, the Substitutions infotype (2003) in SAP Time Management can also be supplied with external operative planned working time. For more information, see Supplying SAP Time Management with Operative Planned Working Times.