Question #13's result is humorous (and expected). Engineers love to claim they make entirely logical buying decision. Just like all people, they don't. Having spent a number of years in engineering-related marketing and sales I have learned that specifications are generally used to disqualify the solutions they don't want and to justify the solutions they do want. Sadly, the specifications used rarely have anything to do with the final solution.
Focus groups generally become the next temptation. Knowing your customer is often better than asking them what they want. If Henry Ford had done a focus group on horse-drawn carriages, people would have asked for faster horses.