Data migration and version-up

Dear all friends,

i am new in SAP,

i plan to join Data mirgration and version-upgrade domain.

please help to show me : process step by step or your experience when upgrade system

ex : process to upgrade from SAP R/3 to SAP ECC.

what life-cycle, document, template should we use !?

thanks !

Edited by: Quoc Luc Nguyen on Apr 22, 2008 6:54 AM