Answered by Susan, Hiring Expert at Praxair, Inc., on Monday, July 9, 2012
The value in listing roles/jobs on a resume is to show the following:
1) the problem or challenge you faced coming into the role
2) how you approached and solved the challenge
3) when you "lived with the results" of your decisions, what you learned from it
Therefore, if you have only faced #1 thus far, then outline the problem/challenge, any research you've accomplished thus far on what "you intend" to do to fix/resolve the challenge, or perhaps how you anticiapte making it more efficient, faster, higher quality, better customer service, etc. If you have not even gotten to #1 yet, then perhaps you give a few bullet points on what you "expect" to deliver/accomplish in the role - which can be your understanding from the interview process (acknowledging you have yet to get into the details and actually do any work thus far).