One of our partners has been asking for some recommended reading -
I can wholeheartedly suggest the following titles -
Oracle Service Bus 11g Development Cookbook
Simple scenario of leveraging the fault policy framework for business errors - probably not the way to go - but the lab does end with leveraging the framework to rethrow the business error back to the BPEL process.
This simple lab demonstrates the use of the fault handling framework for technical errors.
btw. my first blog post 6 years ago was on this very theme - albeit with BPEL running on OC4J.