[hujun]

yes, and I think one big reason enterprise might not buy your product even if it is guaranteed to make/save $X is $ is often NOT most important thing to the people make buying decision, specially when it is not your own money to save or gain

[mindwok]

This is very true. Look no farther than the perennial problem of department heads spending all their budget to keep their budget. Decision makers rarely care about saving money in isolation.