Please read the following blog entry on User versus Product Requirements [url removed, login to view]
Your task is:
To create one new forum entry on one requirements model and comment on its effective use(s) for :
1) Discovering (uncovering) user requirements
2) Documenting product requirements.
NOTE: There is a sample answer (attached word) using Decision Tree Model. But I will discuss with anyone who is interested in this project on the model. As well as be sure to provide hyperlinks to external materials that you quote.