List of tieback process and their differences between 11i and R12

Hi Folks,

We have following tieback processes in 11i.

1. PRC: Tieback Labor Costs from General Ledger

2. PRC: Tieback Expense Reports from Payables

3. PRC: Tieback Usage Costs from General Ledger

4. PRC: Tieback Asset Lines from Oracle Assets

5.PRC: Tieback Cross Charge Distributions From General Ledger

6. PRC: Tieback Invoices from Receivables

7. PRC: Tieback Revenue from General Ledger

Queries as follow's:-

1. So what is the purpose of each tieback process in 11i?

2. How many tieback processes still available in R12?

3. Which functionality is replacing these tieback processes (Which is obsoleted in R12) explain with suitable example, how it will work in R12.