Kas Thomas at CMS Watch – Thinking beyond the RFP:

"Don't ask "How will you be able to handle XYZ?" unless you're willing to tolerate answers like "Our standard user interface allows a user to do this" or "our application programming interface allows the product to be easily extended so as to accomplish this."

Instead, write a user narrative or concrete scenario for every one of your key requirements, and demand a narrative answer in response. For example, rather than ask whether a product natively supports delegation of authority in workflows, compose a concrete user narrative."