Please find the details below :
OS : AIX , DB: Oracle ,SAP PO : NW 7.5 (JAVA only), SAP NWDI : NW 7.5
CMS or CM service : Not yet decided
PO -- DEV,QAS and Prod
NWDI - Single system
Now please let me know whether /usr/sap/trans from PO(DEV) needs to be nfs mount to NWDI system for transport of objects.