Why we need to go for clusters ?

Hi ,
Plz clarify me y we need to go for clusters in ABAP-HR programming ?...
Thanks in advance..
Suresh..

Because, that is where the ( Time & Payroll) Transactional Data is stored.. For Reporting off the Master Data tables you can use the PAnnnn & HRPnnnn Tables with the relevant Authority checks.. PL go through the following <a href="http://help.sap.com/saphelp_erp2005vp/helpdata/en/4f/d528ff575e11d189270000e8322f96/frameset.htm">SAP Help</a> for additional info on HR Clusters.
~Suresh

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