SAP RAR - Best Practice ECC,CRM and BW systems

Hi All
i have the requirement to configure RAR for the systems ECC,CRM and BW systems . Each system has only one client . whats the best practice regarding using the rules against each system . i am assuming the rules will be the same irrespective of the system but when i see the names of the initial files , they are system specific . can anybody elloborate around this . thanks
Regards
Prasad

Prasad,
To build on Chinmaya's explanation, make sure you use a logical system for CRM, BI, and ECC for the basis portion of the rule set (and only the basis portion).  This will keep you from duplicating your rules to meet your basis requirements.  The other rules should be attributed to the individual systems (or additional logical systems if including mult landscapes, ex. Dev, QA, and Prod ECC merged into one ECC logical system).

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