Number Range in SUS doubt

Hey all,

Working in SRM 5.0, ECC 6.0,SUS 3.0.

My question revolves around the PDP-SUS (SUS-MM) scenario specifically with the number ranges:

-In the config document,it states to configure the number ranges for the following local documents:

-PO

-PO Confirmation (PO Response)

-SUS shipping notification (ASN)

-Confirmation (GR)

-IV.

Do these number ranges have to be similar as in the back end?In this case,ECC?

What are the back-end number range config settings that one has to do then?

Points will be duly awarded.

Thanks...

Jack