You're a contractor and you've been...

You're a contractor and you've been short-listed as design/builder for a $39 million corporate lab. As part of your pitch, you emphasize your commitment to quality. You reiterate your ability to suited schedule and budget, even your willingness to make portions of your profits contingent onward those very issues, as you have forward past projects.

nevertheless the word "quality" is what sticks in the client's mind. He asks, would you be willing to take it a grade further? Would you also be willing to risk portions of your profits upon the basis of, say, user satisfaction?

by what mode do you ...