It made a big difference. A B-school class would have started with a focus on market size and used financial analysis to understand it. This D-school class began with consumers and used ethnography, the latest management tool, to learn about them. Business school students would have developed a single new product to sell. The D-schoolers aimed at creating a prototype with possible features that might appeal to consumers. B-school students would have stopped when they completed the first good product idea. The D-schoolers went back again and again to come up with a panoply of possible winners.

from the article The Talent Hunt, Business Week