Root cause analysis

We would like to be able to analyse the root causes of bugs in the software development cycle. It would be very nice to add a "root cause" field in the "Resolve issue" form which should be a mandatory select box. And at the same time there should be a "Create root cause" form to add new root causes. JRA-1724 is a related issue already open but i would like to redefine the request with this new issue.