Time Management... In and out time

Hi All,

The Scenario at my clients site is as follows;

They are using 3rd party time system. The "In and Out" time of every employee will be first recorded there and then the same would be transfered to SAP system.

Now, if the IN-Out time of any employee is available he would be considered as "present" or else "absent" for that particular day. I also want to count the number of hours (working hours) for all the employees.

Please guide me how do I configure the SAP system for the above scenario.

( I have maintained absences quotas but not the attendance quotas? Do I have to maintain that as well? Moreover where should I maintain In and out time of employees in SAP system)

Regards,

Amit