give me standard SRM SUS

SUS Gurus

I need Few clarifications about SRM SUS standard Cycle

we are using SRM 7.01 and Standalone scenario

1.Please give me standard SRM SUS process Steps

2.If the SUS supplier cannot meet all the terms specified in the original PO, Supplier changes them (items, quantities, delivery date, and so on),what is the next step for Purchaser?

3.If Purchaser approve the changed POR we r getting Change PO. But it is not  triggering again for PO Response ?is it standard ?

4.If Purchaser reject  the changed POR we r not  getting Change PO.is it standard ?

5.what  are possibilities for Change PO creation in SRM for SUS?

6.How can Vendor submit Response again and again till both parties agree on the terms of the PO?what changes does need from Purchaser/Vendor?

Regards,

Rama Krishna