Intercompany Accounting

Hi,

We have the below business case and need inputs on intercompany accounting

1. Project organization raises request to the fabrication organization(intercompany) for Fabrication work.
2. Fabrication Organization treats this intercompany request as a project order, creates a project for the same.
3. Delivers the fabricated goods at a transfer price which includes a Markup (margin)
4. Fabrication Org books sales and accounts for markup as well
5. Project org settles the intercompany order thru book adjustment.
6. Project org makes the final sales/delivery--- books revenue and creates receivables.

In the above case, how do we ensure that there is no double booking of revenue(at Project org and Fabrication org) and how does the accounting of markup included in the transfer price done.