Bid decoupling - interface query

Hi All

We have a requirement to use the bid decoupling scenario where suppliers will respond to RFx and take part in live auctions within our SUS system instead of our internal SRM system.

My understanding is that RFx and auctions will be replicated from SRM to SUS for the use of suppliers.

The Supplier's responses will be replicated from SUS back to SRM.

I'm trying to locate information relating to how this data is replicated.

I've read the SRM 7.03 Strategic Sourcing config guide but I cant seem to find this information.

My questions are:

1. Is my understanding above correct?

2. Can you please provide the Integration Scenario name to implement the above using PI. Details of the message types would also be useful.

Thanks in advance

James