2 Paths for the transports

Hi,

Netweaver 7.00

We have the folowing for the transports

DEV - > QAL -> Pre-PROD -> Prod

Pre-prod is not very used

so the developpers want to use Pre-prod as quality for a new project

like below:

DEV -> Pre-prod -> QAL -> prod

is it possible to have the 2 paths together ?

Is it a good configuration ?

Thanks for your help