Best Practice of Parallel Development Lifecycles

Dear all,
Looking for some best practice information regarding the Parallel Development Lifecycles used either for the system upgrade or phased implementation. I need to understand the way how to change the object ownership while merge the two lifecycles into one production system.
Any help and/or direction is appreciated.
Thanks,
Joshua

Hi There are many levels involved in PDL .
Please have white papers on tehis
http://www.infoworld.com/pdf/whitepaper/SAPParallelDevelopmentManagementByNewmerix103107.pdf
http://help.sap.com/saphelp_nwce10/helpdata/en/45/4b5d276e891192e10000000a1553f7/content.htm
http://www.agilejournal.com/news/397-mks-integrity-and-sap-linking-software-and-production-processes-at-continental-automotive-systems
All the best
nag

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